$ git clone -n https://src.fedoraproject.org/rpms/checkpolicy.git /var/lib/mock/f41-build-813663-148772/root/chroot_tmpdir/scmroot/checkpolicy
Cloning into '/var/lib/mock/f41-build-813663-148772/root/chroot_tmpdir/scmroot/checkpolicy'...
$ git fetch origin b2dbc88e0af8ecc8e8cc254215a94a68c74a8659:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/checkpolicy
 * [new ref]         b2dbc88e0af8ecc8e8cc254215a94a68c74a8659 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2dbc88 Move changelog to changelog and use %autochangelog