$ git clone -n https://src.fedoraproject.org/rpms/kf5-kitinerary.git /var/lib/mock/f40-build-2067462-49291/root/chroot_tmpdir/scmroot/kf5-kitinerary
Cloning into '/var/lib/mock/f40-build-2067462-49291/root/chroot_tmpdir/scmroot/kf5-kitinerary'...
$ git fetch origin b39a97ce772ba7958022acf5caecfa9c9a28d8cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kitinerary
 * [new ref]         b39a97ce772ba7958022acf5caecfa9c9a28d8cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b39a97c Updated spec's licenses to SPDX format