$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v8.3-u-dtt1-11516-29832/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-u-dtt1-11516-29832/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin 9ce3ec3a6474f6fc57f2ac4210fe8447f3ce3c14:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         9ce3ec3a6474f6fc57f2ac4210fe8447f3ce3c14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ce3ec3 bump release for test build