$ git clone -n https://github.com/xcp-ng-rpms/xcp-featured /var/lib/mock/v8.3-u-psafont1-10502-29058/root/chroot_tmpdir/scmroot/xcp-featured
Cloning into '/var/lib/mock/v8.3-u-psafont1-10502-29058/root/chroot_tmpdir/scmroot/xcp-featured'...
$ git fetch origin 7bef3d24a27834f34545eb31bc3af5ffdf3e23c7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-featured
 * [new ref]         7bef3d24a27834f34545eb31bc3af5ffdf3e23c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bef3d2 bump release for test build