open HEAD, ">$git_dir/refs/heads/$ps->{branch}";
print HEAD $commitid;
close HEAD;
- unlink ("$git_dir/HEAD");
- symlink("refs/heads/$ps->{branch}","$git_dir/HEAD");
+ system('git-update-ref', 'HEAD', "$ps->{branch}");
# tag accordingly
ptag($ps->{id}, $commitid); # private tag