$ git clone -n https://src.fedoraproject.org/rpms/kf6-prison.git /var/lib/mock/f41-build-860151-168834/root/chroot_tmpdir/scmroot/kf6-prison
Cloning into '/var/lib/mock/f41-build-860151-168834/root/chroot_tmpdir/scmroot/kf6-prison'...
$ git fetch origin 05378fbe468b6dd1596d5ff4870941db00dc87f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-prison
 * [new ref]         05378fbe468b6dd1596d5ff4870941db00dc87f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05378fb 6.7.0