$ git clone -n https://src.fedoraproject.org/rpms/greenboot.git /var/lib/mock/f39-build-1558664-37307/root/chroot_tmpdir/scmroot/greenboot
Cloning into '/var/lib/mock/f39-build-1558664-37307/root/chroot_tmpdir/scmroot/greenboot'...
$ git fetch origin d1b96beab7afd083acfd412aa9646d835031e92a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/greenboot
 * [new ref]         d1b96beab7afd083acfd412aa9646d835031e92a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1b96be migrated to SPDX license