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#!/bin/sh
. git-sh-setup-script || die "Not a git archive"
branchname="$1"
case "$2" in
'')
head=HEAD ;;
*)
head="$2^0" ;;
esac
rev=$(git-rev-parse --revs-only --verify "$head") || exit
[ -z "$branchname" ] && die "git branch: I want a branch name"
[ -e "$GIT_DIR/refs/heads/$branchname" ] && die "$branchname already exists"
echo $rev > "$GIT_DIR/refs/heads/$branchname"
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