Gecko [ sachasauda.akalacademy.ac.in ]

Name	Size	Permission
RelNotes	[ DIR ]	drwxr-xr-x
contrib	[ DIR ]	drwxr-xr-x
howto	[ DIR ]	drwxr-xr-x
technical	[ DIR ]	drwxr-xr-x
COPYING	18.33 KB	-rw-r--r--
README	2.56 KB	-rw-r--r--
blame-options.txt	3.95 KB	-rw-r--r--
cmds-ancillaryinterrogators.tx...	1.18 KB	-rw-r--r--
cmds-ancillarymanipulators.txt	1005 B	-rw-r--r--
cmds-foreignscminterface.txt	760 B	-rw-r--r--
cmds-mainporcelain.txt	2.5 KB	-rw-r--r--
cmds-plumbinginterrogators.txt	1.34 KB	-rw-r--r--
cmds-plumbingmanipulators.txt	1.21 KB	-rw-r--r--
cmds-purehelpers.txt	1.11 KB	-rw-r--r--
cmds-synchelpers.txt	543 B	-rw-r--r--
cmds-synchingrepositories.txt	397 B	-rw-r--r--
config.txt	90.14 KB	-rw-r--r--
date-formats.txt	848 B	-rw-r--r--
diff-config.txt	6.87 KB	-rw-r--r--
diff-format.txt	5.44 KB	-rw-r--r--
diff-generate-patch.txt	6.44 KB	-rw-r--r--
diff-options.txt	18.12 KB	-rw-r--r--
docbook-xsl.css	4.45 KB	-rw-r--r--
everyday.html	35.06 KB	-rw-r--r--
everyday.txt	12.71 KB	-rw-r--r--
fetch-options.txt	4.22 KB	-rw-r--r--
git-add.html	35.63 KB	-rw-r--r--
git-add.txt	13.96 KB	-rw-r--r--
git-am.html	25.86 KB	-rw-r--r--
git-am.txt	6.02 KB	-rw-r--r--
git-annotate.html	23.32 KB	-rw-r--r--
git-annotate.txt	752 B	-rw-r--r--
git-apply.html	30.82 KB	-rw-r--r--
git-apply.txt	10.07 KB	-rw-r--r--
git-archive.html	25.88 KB	-rw-r--r--
git-archive.txt	6.05 KB	-rw-r--r--
git-bisect-lk2009.html	78.86 KB	-rw-r--r--
git-bisect-lk2009.txt	48.08 KB	-rw-r--r--
git-bisect.html	33.08 KB	-rw-r--r--
git-bisect.txt	12.38 KB	-rw-r--r--
git-blame.html	37.08 KB	-rw-r--r--
git-blame.txt	7.63 KB	-rw-r--r--
git-branch.html	31.29 KB	-rw-r--r--
git-branch.txt	9.87 KB	-rw-r--r--
git-bundle.html	25.72 KB	-rw-r--r--
git-bundle.txt	6.89 KB	-rw-r--r--
git-cat-file.html	21.04 KB	-rw-r--r--
git-cat-file.txt	2.9 KB	-rw-r--r--
git-check-attr.html	21.17 KB	-rw-r--r--
git-check-attr.txt	2.72 KB	-rw-r--r--
git-check-ignore.html	20.25 KB	-rw-r--r--
git-check-ignore.txt	2.35 KB	-rw-r--r--
git-check-ref-format.html	22.43 KB	-rw-r--r--
git-check-ref-format.txt	4.08 KB	-rw-r--r--
git-checkout-index.html	24.34 KB	-rw-r--r--
git-checkout-index.txt	5.31 KB	-rw-r--r--
git-checkout.html	38.47 KB	-rw-r--r--
git-checkout.txt	15.61 KB	-rw-r--r--
git-cherry-pick.html	28.28 KB	-rw-r--r--
git-cherry-pick.txt	7.73 KB	-rw-r--r--
git-cherry.html	19.15 KB	-rw-r--r--
git-cherry.txt	1.71 KB	-rw-r--r--
git-citool.html	17.13 KB	-rw-r--r--
git-citool.txt	543 B	-rw-r--r--
git-clean.html	19.45 KB	-rw-r--r--
git-clean.txt	1.92 KB	-rw-r--r--
git-clone.html	34.75 KB	-rw-r--r--
git-clone.txt	9.84 KB	-rw-r--r--
git-column.html	18.47 KB	-rw-r--r--
git-column.txt	1.14 KB	-rw-r--r--
git-commit-tree.html	25.04 KB	-rw-r--r--
git-commit-tree.txt	2.79 KB	-rw-r--r--
git-commit.html	43.18 KB	-rw-r--r--
git-commit.txt	14.96 KB	-rw-r--r--
git-config.html	181.42 KB	-rw-r--r--
git-config.txt	11.52 KB	-rw-r--r--
git-count-objects.html	18.11 KB	-rw-r--r--
git-count-objects.txt	1.06 KB	-rw-r--r--
git-credential-cache--daemon.h...	17.4 KB	-rw-r--r--
git-credential-cache--daemon.t...	684 B	-rw-r--r--
git-credential-cache.html	19.26 KB	-rw-r--r--
git-credential-cache.txt	2.13 KB	-rw-r--r--
git-credential-store.html	19.42 KB	-rw-r--r--
git-credential-store.txt	2.11 KB	-rw-r--r--
git-credential.html	23.82 KB	-rw-r--r--
git-credential.txt	5.72 KB	-rw-r--r--
git-cvsexportcommit.html	21.34 KB	-rw-r--r--
git-cvsexportcommit.txt	3.13 KB	-rw-r--r--
git-cvsimport.html	27.62 KB	-rw-r--r--
git-cvsimport.txt	7.57 KB	-rw-r--r--
git-cvsserver.html	38.1 KB	-rw-r--r--
git-cvsserver.txt	15.21 KB	-rw-r--r--
git-daemon.html	32.69 KB	-rw-r--r--
git-daemon.txt	11.58 KB	-rw-r--r--
git-describe.html	24.35 KB	-rw-r--r--
git-describe.txt	5.59 KB	-rw-r--r--
git-diff-files.html	59.9 KB	-rw-r--r--
git-diff-files.txt	1.18 KB	-rw-r--r--
git-diff-index.html	64.69 KB	-rw-r--r--
git-diff-index.txt	4.49 KB	-rw-r--r--
git-diff-tree.html	82.31 KB	-rw-r--r--
git-diff-tree.txt	5.26 KB	-rw-r--r--
git-diff.html	66.63 KB	-rw-r--r--
git-diff.txt	5.34 KB	-rw-r--r--
git-difftool.html	22.93 KB	-rw-r--r--
git-difftool.txt	4.02 KB	-rw-r--r--
git-fast-export.html	23.45 KB	-rw-r--r--
git-fast-export.txt	5.16 KB	-rw-r--r--
git-fast-import.html	92.66 KB	-rw-r--r--
git-fast-import.txt	53.75 KB	-rw-r--r--
git-fetch-pack.html	21.26 KB	-rw-r--r--
git-fetch-pack.txt	3.28 KB	-rw-r--r--
git-fetch.html	38.95 KB	-rw-r--r--
git-fetch.txt	2.65 KB	-rw-r--r--
git-filter-branch.html	37.67 KB	-rw-r--r--
git-filter-branch.txt	16.84 KB	-rw-r--r--
git-fmt-merge-msg.html	19.55 KB	-rw-r--r--
git-fmt-merge-msg.txt	1.87 KB	-rw-r--r--
git-for-each-ref.html	25.45 KB	-rw-r--r--
git-for-each-ref.txt	5.72 KB	-rw-r--r--
git-format-patch.html	58.91 KB	-rw-r--r--
git-format-patch.txt	18.38 KB	-rw-r--r--
git-fsck-objects.html	16.88 KB	-rw-r--r--
git-fsck-objects.txt	354 B	-rw-r--r--
git-fsck.html	23.33 KB	-rw-r--r--
git-fsck.txt	4.54 KB	-rw-r--r--
git-gc.html	23.82 KB	-rw-r--r--
git-gc.txt	5.34 KB	-rw-r--r--
git-get-tar-commit-id.html	17.32 KB	-rw-r--r--
git-get-tar-commit-id.txt	737 B	-rw-r--r--
git-grep.html	29.02 KB	-rw-r--r--
git-grep.txt	7.55 KB	-rw-r--r--
git-gui.html	22.1 KB	-rw-r--r--
git-gui.txt	3.5 KB	-rw-r--r--
git-hash-object.html	18.92 KB	-rw-r--r--
git-hash-object.txt	1.8 KB	-rw-r--r--
git-help.html	25.14 KB	-rw-r--r--
git-help.txt	5.99 KB	-rw-r--r--
git-http-backend.html	28.46 KB	-rw-r--r--
git-http-backend.txt	9.48 KB	-rw-r--r--
git-http-fetch.html	18.41 KB	-rw-r--r--
git-http-fetch.txt	1.14 KB	-rw-r--r--
git-http-push.html	20.73 KB	-rw-r--r--
git-http-push.txt	2.91 KB	-rw-r--r--
git-imap-send.html	22.84 KB	-rw-r--r--
git-imap-send.txt	4.24 KB	-rw-r--r--
git-index-pack.html	21.01 KB	-rw-r--r--
git-index-pack.txt	3.32 KB	-rw-r--r--
git-init-db.html	16.95 KB	-rw-r--r--
git-init-db.txt	409 B	-rw-r--r--
git-init.html	23 KB	-rw-r--r--
git-init.txt	4.69 KB	-rw-r--r--
git-instaweb.html	20.06 KB	-rw-r--r--
git-instaweb.txt	2.25 KB	-rw-r--r--
git-log.html	111.87 KB	-rw-r--r--
git-log.txt	5.68 KB	-rw-r--r--
git-lost-found.html	18.83 KB	-rw-r--r--
git-lost-found.txt	1.69 KB	-rw-r--r--
git-ls-files.html	26.46 KB	-rw-r--r--
git-ls-files.txt	6.1 KB	-rw-r--r--
git-ls-remote.html	20.11 KB	-rw-r--r--
git-ls-remote.txt	2.54 KB	-rw-r--r--
git-ls-tree.html	21.06 KB	-rw-r--r--
git-ls-tree.txt	2.93 KB	-rw-r--r--
git-mailinfo.html	20.78 KB	-rw-r--r--
git-mailinfo.txt	3 KB	-rw-r--r--
git-mailsplit.html	18.52 KB	-rw-r--r--
git-mailsplit.txt	1.21 KB	-rw-r--r--
git-merge-base.html	23.17 KB	-rw-r--r--
git-merge-base.txt	4.32 KB	-rw-r--r--
git-merge-file.html	20.71 KB	-rw-r--r--
git-merge-file.txt	2.72 KB	-rw-r--r--
git-merge-index.html	19.88 KB	-rw-r--r--
git-merge-index.txt	2.39 KB	-rw-r--r--
git-merge-one-file.html	16.9 KB	-rw-r--r--
git-merge-one-file.txt	387 B	-rw-r--r--
git-merge-tree.html	17.32 KB	-rw-r--r--
git-merge-tree.txt	749 B	-rw-r--r--
git-merge.html	50.38 KB	-rw-r--r--
git-merge.txt	11.97 KB	-rw-r--r--
git-mergetool--lib.html	18.23 KB	-rw-r--r--
git-mergetool--lib.txt	1.18 KB	-rw-r--r--
git-mergetool.html	20.98 KB	-rw-r--r--
git-mergetool.txt	3.26 KB	-rw-r--r--
git-mktag.html	17.63 KB	-rw-r--r--
git-mktag.txt	806 B	-rw-r--r--
git-mktree.html	17.94 KB	-rw-r--r--
git-mktree.txt	1.05 KB	-rw-r--r--
git-mv.html	18.33 KB	-rw-r--r--
git-mv.txt	1.16 KB	-rw-r--r--
git-name-rev.html	19.17 KB	-rw-r--r--
git-name-rev.txt	1.68 KB	-rw-r--r--
git-notes.html	35.71 KB	-rw-r--r--
git-notes.txt	13.08 KB	-rw-r--r--
git-p4.html	44.35 KB	-rw-r--r--
git-p4.txt	18.73 KB	-rw-r--r--
git-pack-objects.html	28.46 KB	-rw-r--r--
git-pack-objects.txt	8.86 KB	-rw-r--r--
git-pack-redundant.html	18.24 KB	-rw-r--r--
git-pack-redundant.txt	1.13 KB	-rw-r--r--
git-pack-refs.html	19.15 KB	-rw-r--r--
git-pack-refs.txt	2.06 KB	-rw-r--r--
git-parse-remote.html	16.97 KB	-rw-r--r--
git-parse-remote.txt	471 B	-rw-r--r--
git-patch-id.html	17.71 KB	-rw-r--r--
git-patch-id.txt	940 B	-rw-r--r--
git-peek-remote.html	18.03 KB	-rw-r--r--
git-peek-remote.txt	1.08 KB	-rw-r--r--
git-prune-packed.html	17.99 KB	-rw-r--r--
git-prune-packed.txt	935 B	-rw-r--r--
git-prune.html	19.57 KB	-rw-r--r--
git-prune.txt	1.76 KB	-rw-r--r--
git-pull.html	54.96 KB	-rw-r--r--
git-pull.txt	7.72 KB	-rw-r--r--
git-push.html	48.49 KB	-rw-r--r--
git-push.txt	16.26 KB	-rw-r--r--
git-quiltimport.html	18.4 KB	-rw-r--r--
git-quiltimport.txt	1.4 KB	-rw-r--r--
git-read-tree.html	38.05 KB	-rw-r--r--
git-read-tree.txt	16.36 KB	-rw-r--r--
git-rebase.html	57.88 KB	-rw-r--r--
git-rebase.txt	23.62 KB	-rw-r--r--
git-receive-pack.html	23.98 KB	-rw-r--r--
git-receive-pack.txt	5.48 KB	-rw-r--r--
git-reflog.html	20.86 KB	-rw-r--r--
git-reflog.txt	3.09 KB	-rw-r--r--
git-relink.html	17.41 KB	-rw-r--r--
git-relink.txt	649 B	-rw-r--r--
git-remote-ext.html	22.43 KB	-rw-r--r--
git-remote-ext.txt	3.93 KB	-rw-r--r--
git-remote-fd.html	19 KB	-rw-r--r--
git-remote-fd.txt	1.63 KB	-rw-r--r--
git-remote-helpers.html	16.45 KB	-rw-r--r--
git-remote-testgit.html	17.26 KB	-rw-r--r--
git-remote-testgit.txt	570 B	-rw-r--r--
git-remote.html	26.62 KB	-rw-r--r--
git-remote.txt	6.79 KB	-rw-r--r--
git-repack.html	22.99 KB	-rw-r--r--
git-repack.txt	4.52 KB	-rw-r--r--
git-replace.html	19.86 KB	-rw-r--r--
git-replace.txt	2.26 KB	-rw-r--r--
git-repo-config.html	16.85 KB	-rw-r--r--
git-repo-config.txt	324 B	-rw-r--r--
git-request-pull.html	17.41 KB	-rw-r--r--
git-request-pull.txt	528 B	-rw-r--r--
git-rerere.html	25.93 KB	-rw-r--r--
git-rerere.txt	7.29 KB	-rw-r--r--
git-reset.html	36.54 KB	-rw-r--r--
git-reset.txt	14.15 KB	-rw-r--r--
git-rev-list.html	73.64 KB	-rw-r--r--
git-rev-list.txt	3.59 KB	-rw-r--r--
git-rev-parse.html	46.91 KB	-rw-r--r--
git-rev-parse.txt	10.03 KB	-rw-r--r--
git-revert.html	22.61 KB	-rw-r--r--
git-revert.txt	3.69 KB	-rw-r--r--
git-rm.html	24.83 KB	-rw-r--r--
git-rm.txt	5.68 KB	-rw-r--r--
git-send-email.html	36.99 KB	-rw-r--r--
git-send-email.txt	13.93 KB	-rw-r--r--
git-send-pack.html	21.8 KB	-rw-r--r--
git-send-pack.txt	3.6 KB	-rw-r--r--
git-sh-i18n--envsubst.html	17.64 KB	-rw-r--r--
git-sh-i18n--envsubst.txt	928 B	-rw-r--r--
git-sh-i18n.html	18.06 KB	-rw-r--r--
git-sh-i18n.txt	1.12 KB	-rw-r--r--
git-sh-setup.html	20.46 KB	-rw-r--r--
git-sh-setup.txt	2.73 KB	-rw-r--r--
git-shell.html	20.25 KB	-rw-r--r--
git-shell.txt	2.47 KB	-rw-r--r--
git-shortlog.html	24.29 KB	-rw-r--r--
git-shortlog.txt	2.57 KB	-rw-r--r--
git-show-branch.html	25.52 KB	-rw-r--r--
git-show-branch.txt	6.36 KB	-rw-r--r--
git-show-index.html	17.03 KB	-rw-r--r--
git-show-index.txt	478 B	-rw-r--r--
git-show-ref.html	24.15 KB	-rw-r--r--
git-show-ref.txt	5.83 KB	-rw-r--r--
git-show.html	38.73 KB	-rw-r--r--
git-show.txt	1.64 KB	-rw-r--r--
git-stage.html	16.82 KB	-rw-r--r--
git-stage.txt	300 B	-rw-r--r--
git-stash.html	29.25 KB	-rw-r--r--
git-stash.txt	9.85 KB	-rw-r--r--
git-status.html	27.38 KB	-rw-r--r--
git-status.txt	7.77 KB	-rw-r--r--
git-stripspace.html	19.37 KB	-rw-r--r--
git-stripspace.txt	1.83 KB	-rw-r--r--
git-submodule.html	36.33 KB	-rw-r--r--
git-submodule.txt	15.13 KB	-rw-r--r--
git-svn.html	73.85 KB	-rw-r--r--
git-svn.txt	41.53 KB	-rw-r--r--
git-symbolic-ref.html	19.37 KB	-rw-r--r--
git-symbolic-ref.txt	1.93 KB	-rw-r--r--
git-tag.html	31.51 KB	-rw-r--r--
git-tag.txt	9.44 KB	-rw-r--r--
git-tar-tree.html	20.04 KB	-rw-r--r--
git-tar-tree.txt	2.31 KB	-rw-r--r--
git-tools.html	22.01 KB	-rw-r--r--
git-tools.txt	3.36 KB	-rw-r--r--
git-unpack-file.html	17.13 KB	-rw-r--r--
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git-unpack-objects.html	18.15 KB	-rw-r--r--
git-unpack-objects.txt	1.14 KB	-rw-r--r--
git-update-index.html	35.2 KB	-rw-r--r--
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git-update-ref.html	20.82 KB	-rw-r--r--
git-update-ref.txt	3.16 KB	-rw-r--r--
git-update-server-info.html	17.72 KB	-rw-r--r--
git-update-server-info.txt	797 B	-rw-r--r--
git-upload-archive.html	17.35 KB	-rw-r--r--
git-upload-archive.txt	617 B	-rw-r--r--
git-upload-pack.html	17.88 KB	-rw-r--r--
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git-var.html	19.08 KB	-rw-r--r--
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git-verify-pack.html	18.39 KB	-rw-r--r--
git-verify-pack.txt	1.07 KB	-rw-r--r--
git-verify-tag.html	17.2 KB	-rw-r--r--
git-verify-tag.txt	411 B	-rw-r--r--
git-web--browse.html	21.63 KB	-rw-r--r--
git-web--browse.txt	3.43 KB	-rw-r--r--
git-whatchanged.html	35.64 KB	-rw-r--r--
git-whatchanged.txt	1.55 KB	-rw-r--r--
git-write-tree.html	17.91 KB	-rw-r--r--
git-write-tree.txt	1 KB	-rw-r--r--
git.html	70.05 KB	-rw-r--r--
git.txt	31.8 KB	-rw-r--r--
gitattributes.html	62.01 KB	-rw-r--r--
gitattributes.txt	33.51 KB	-rw-r--r--
gitcli.html	26.56 KB	-rw-r--r--
gitcli.txt	7.75 KB	-rw-r--r--
gitcore-tutorial.html	99.92 KB	-rw-r--r--
gitcore-tutorial.txt	62.33 KB	-rw-r--r--
gitcredentials.html	24.45 KB	-rw-r--r--
gitcredentials.txt	5.93 KB	-rw-r--r--
gitcvs-migration.html	26.03 KB	-rw-r--r--
gitcvs-migration.txt	7.38 KB	-rw-r--r--
gitdiffcore.html	29.51 KB	-rw-r--r--
gitdiffcore.txt	10.78 KB	-rw-r--r--
gitglossary.html	48.63 KB	-rw-r--r--
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githooks.html	35.01 KB	-rw-r--r--
githooks.txt	13.48 KB	-rw-r--r--
gitignore.html	24.81 KB	-rw-r--r--
gitignore.txt	6.58 KB	-rw-r--r--
gitk.html	21.61 KB	-rw-r--r--
gitk.txt	3.23 KB	-rw-r--r--
gitmodules.html	21.72 KB	-rw-r--r--
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gitnamespaces.html	20.5 KB	-rw-r--r--
gitnamespaces.txt	3.2 KB	-rw-r--r--
gitremote-helpers.html	39.11 KB	-rw-r--r--
gitremote-helpers.txt	16.06 KB	-rw-r--r--
gitrepository-layout.html	28.1 KB	-rw-r--r--
gitrepository-layout.txt	7.95 KB	-rw-r--r--
gitrevisions.html	32.66 KB	-rw-r--r--
gitrevisions.txt	774 B	-rw-r--r--
gittutorial-2.html	33.55 KB	-rw-r--r--
gittutorial-2.txt	14.37 KB	-rw-r--r--
gittutorial.html	44.41 KB	-rw-r--r--
gittutorial.txt	22.43 KB	-rw-r--r--
gitweb.conf.html	66.11 KB	-rw-r--r--
gitweb.conf.txt	37.3 KB	-rw-r--r--
gitweb.html	50.94 KB	-rw-r--r--
gitweb.txt	26.34 KB	-rw-r--r--
gitworkflows.html	38.85 KB	-rw-r--r--
gitworkflows.txt	17 KB	-rw-r--r--
glossary-content.txt	21.95 KB	-rw-r--r--
howto-index.html	21.31 KB	-rw-r--r--
howto-index.txt	3.29 KB	-rw-r--r--
i18n.txt	2.16 KB	-rw-r--r--
mailmap.txt	2.35 KB	-rw-r--r--
merge-config.txt	3.47 KB	-rw-r--r--
merge-options.txt	3.58 KB	-rw-r--r--
merge-strategies.txt	4.6 KB	-rw-r--r--
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mergetools-merge.txt	187 B	-rw-r--r--
pretty-formats.txt	7.59 KB	-rw-r--r--
pretty-options.txt	2.81 KB	-rw-r--r--
pull-fetch-param.txt	3.19 KB	-rw-r--r--
rev-list-options.txt	27.11 KB	-rw-r--r--
revisions.txt	11.5 KB	-rw-r--r--
sequencer.txt	392 B	-rw-r--r--
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<div id="header">
<h1>
git-update-ref(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>git-update-ref -
   Update the object name stored in a ref safely
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git update-ref</em> [-m &lt;reason&gt;] (-d &lt;ref&gt; [&lt;oldvalue&gt;] | [--no-deref] &lt;ref&gt; &lt;newvalue&gt; [&lt;oldvalue&gt;])</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Given two arguments, stores the &lt;newvalue&gt; in the &lt;ref&gt;, possibly
dereferencing the symbolic refs.  E.g. <code>git update-ref HEAD
&lt;newvalue&gt;</code> updates the current branch head to the new object.</p></div>
<div class="paragraph"><p>Given three arguments, stores the &lt;newvalue&gt; in the &lt;ref&gt;,
possibly dereferencing the symbolic refs, after verifying that
the current value of the &lt;ref&gt; matches &lt;oldvalue&gt;.
E.g. <code>git update-ref refs/heads/master &lt;newvalue&gt; &lt;oldvalue&gt;</code>
updates the master branch head to &lt;newvalue&gt; only if its current
value is &lt;oldvalue&gt;.  You can specify 40 "0" or an empty string
as &lt;oldvalue&gt; to make sure that the ref you are creating does
not exist.</p></div>
<div class="paragraph"><p>It also allows a "ref" file to be a symbolic pointer to another
ref file by starting with the four-byte header sequence of
"ref:".</p></div>
<div class="paragraph"><p>More importantly, it allows the update of a ref file to follow
these symbolic pointers, whether they are symlinks or these
"regular file symbolic refs".  It follows <strong>real</strong> symlinks only
if they start with "refs/": otherwise it will just try to read
them and update them as a regular file (i.e. it will allow the
filesystem to follow them, but will overwrite such a symlink to
somewhere else with a regular filename).</p></div>
<div class="paragraph"><p>If --no-deref is given, &lt;ref&gt; itself is overwritten, rather than
the result of following the symbolic pointers.</p></div>
<div class="paragraph"><p>In general, using</p></div>
<div class="literalblock">
<div class="content">
<pre><code>git update-ref HEAD "$head"</code></pre>
</div></div>
<div class="paragraph"><p>should be a <em>lot</em> safer than doing</p></div>
<div class="literalblock">
<div class="content">
<pre><code>echo "$head" &gt; "$GIT_DIR/HEAD"</code></pre>
</div></div>
<div class="paragraph"><p>both from a symlink following standpoint <strong>and</strong> an error checking
standpoint.  The "refs/" rule for symlinks means that symlinks
that point to "outside" the tree are safe: they&#8217;ll be followed
for reading but not for writing (so we&#8217;ll never write through a
ref symlink to some other tree, if you have copied a whole
archive by creating a symlink tree).</p></div>
<div class="paragraph"><p>With <code>-d</code> flag, it deletes the named &lt;ref&gt; after verifying it
still contains &lt;oldvalue&gt;.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_logging_updates">Logging Updates</h2>
<div class="sectionbody">
<div class="paragraph"><p>If config parameter "core.logAllRefUpdates" is true and the ref is one under
"refs/heads/", "refs/remotes/", "refs/notes/", or the symbolic ref HEAD; or
the file "$GIT_DIR/logs/&lt;ref&gt;" exists then <code>git update-ref</code> will append
a line to the log file "$GIT_DIR/logs/&lt;ref&gt;" (dereferencing all
symbolic refs before creating the log name) describing the change
in ref value.  Log lines are formatted as:</p></div>
<div class="olist arabic"><ol class="arabic">
<li>
<p>
oldsha1 SP newsha1 SP committer LF
</p>
<div class="paragraph"><p>Where "oldsha1" is the 40 character hexadecimal value previously
stored in &lt;ref&gt;, "newsha1" is the 40 character hexadecimal value of
&lt;newvalue&gt; and "committer" is the committer&#8217;s name, email address
and date in the standard Git committer ident format.</p></div>
</li>
</ol></div>
<div class="paragraph"><p>Optionally with -m:</p></div>
<div class="olist arabic"><ol class="arabic">
<li>
<p>
oldsha1 SP newsha1 SP committer TAB message LF
</p>
<div class="paragraph"><p>Where all fields are as described above and "message" is the
value supplied to the -m option.</p></div>
</li>
</ol></div>
<div class="paragraph"><p>An update will fail (without changing &lt;ref&gt;) if the current user is
unable to create a new log file, append to the existing log file
or does not have committer information available.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated 2013-06-10 20:01:55 UTC
</div>
</div>
</body>
</html>

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