$ git clone -n https://src.fedoraproject.org/rpms/lucene.git /var/lib/mock/f40-build-2411323-60561/root/chroot_tmpdir/scmroot/lucene
Cloning into '/var/lib/mock/f40-build-2411323-60561/root/chroot_tmpdir/scmroot/lucene'...
$ git fetch origin cfa969ac90c3481447f5008e56b5825cc85a46c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lucene
 * [new ref]         cfa969ac90c3481447f5008e56b5825cc85a46c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cfa969a Upstream update to 9.9.2