$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v9.0-u-ydi1-11397-29709/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v9.0-u-ydi1-11397-29709/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin ff0b322265cc33fade65fd53b60326e08a2867c0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         ff0b322265cc33fade65fd53b60326e08a2867c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff0b322 bump release for test build