$ git clone -n https://src.fedoraproject.org/rpms/lucene.git /var/lib/mock/f41-build-1220815-22750/root/chroot_tmpdir/scmroot/lucene
Cloning into '/var/lib/mock/f41-build-1220815-22750/root/chroot_tmpdir/scmroot/lucene'...
$ git fetch origin 92df6fc8c5f5676a50902ed5d1885faf56765382:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lucene
 * [new ref]         92df6fc8c5f5676a50902ed5d1885faf56765382 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92df6fc Switch to SPDX license