$ git clone -n https://src.fedoraproject.org/rpms/plexus-velocity.git /var/lib/mock/f40-build-2418152-60573/root/chroot_tmpdir/scmroot/plexus-velocity
Cloning into '/var/lib/mock/f40-build-2418152-60573/root/chroot_tmpdir/scmroot/plexus-velocity'...
$ git fetch origin ec200700a8dc7604b6536b02aebe163c852228c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-velocity
 * [new ref]         ec200700a8dc7604b6536b02aebe163c852228c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec20070 Fix build with plexus-containers 2.2.0