$ git clone -n https://src.fedoraproject.org/rpms/openriichi.git /var/lib/mock/f45-build-21093-578/root/chroot_tmpdir/scmroot/openriichi
Cloning into '/var/lib/mock/f45-build-21093-578/root/chroot_tmpdir/scmroot/openriichi'...
$ git fetch origin 9e46e17857ef2d4facb8efd2ebbd9a1f9895d9e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openriichi
 * [new ref]         9e46e17857ef2d4facb8efd2ebbd9a1f9895d9e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e46e17 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild