$ git clone -n https://gitee.com/zhonglingh/xformers.git /var/lib/mock/dist-an23-epao-build-354168-71029/root/chroot_tmpdir/scmroot/xformers
Cloning into '/var/lib/mock/dist-an23-epao-build-354168-71029/root/chroot_tmpdir/scmroot/xformers'...
$ git fetch origin a23:KOJI_FETCH_HEAD
fatal: couldn't find remote ref a23
$ git reset --hard origin/a23
fatal: ambiguous argument 'origin/a23': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'