$ git clone -n https://src.fedoraproject.org/rpms/kf6-prison.git /var/lib/mock/f40-build-2253614-54214/root/chroot_tmpdir/scmroot/kf6-prison
Cloning into '/var/lib/mock/f40-build-2253614-54214/root/chroot_tmpdir/scmroot/kf6-prison'...
$ git fetch origin 285c70488746054aa939060f500e93d2b0364434:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-prison
 * [new ref]         285c70488746054aa939060f500e93d2b0364434 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 285c704 5.248.0