$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v8.3-incoming-9212-28007/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-incoming-9212-28007/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin 53954d9d608743ec386b6411fe706c967d17e03b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         53954d9d608743ec386b6411fe706c967d17e03b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53954d9 Update our patches on 3.2.12-10