$ git clone -n https://src.fedoraproject.org/rpms/livesys-scripts.git /var/lib/mock/f40-build-2238096-53557/root/chroot_tmpdir/scmroot/livesys-scripts
Cloning into '/var/lib/mock/f40-build-2238096-53557/root/chroot_tmpdir/scmroot/livesys-scripts'...
$ git fetch origin 8ef681e813aa59410a8a08d19033b16837d3b65d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/livesys-scripts
 * [new ref]         8ef681e813aa59410a8a08d19033b16837d3b65d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ef681e Update to 0.6.0