$ git clone -n https://gitee.com/mgb01105731/binutils.git /var/lib/mock/dist-an27-build-527687-79680/root/chroot_tmpdir/scmroot/binutils
Cloning into '/var/lib/mock/dist-an27-build-527687-79680/root/chroot_tmpdir/scmroot/binutils'...
$ git fetch origin a27:KOJI_FETCH_HEAD
fatal: couldn't find remote ref a27
$ git reset --hard origin/a27
fatal: ambiguous argument 'origin/a27': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'