$ git clone -n https://src.fedoraproject.org/rpms/plexus-velocity.git /var/lib/mock/f40-build-2612109-63978/root/chroot_tmpdir/scmroot/plexus-velocity
Cloning into '/var/lib/mock/f40-build-2612109-63978/root/chroot_tmpdir/scmroot/plexus-velocity'...
$ git fetch origin a6fc503b513c9cc9349938f7703286283a99863d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-velocity
 * [new ref]         a6fc503b513c9cc9349938f7703286283a99863d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6fc503 Rebuilt for java-21-openjdk as system jdk