$ git clone -n https://src.fedoraproject.org/rpms/libopkele.git /var/lib/mock/f45-build-16711-490/root/chroot_tmpdir/scmroot/libopkele
Cloning into '/var/lib/mock/f45-build-16711-490/root/chroot_tmpdir/scmroot/libopkele'...
$ git fetch origin 86f6c66ddb7da0ac7d08e9ed2d3d43e4490ad453:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libopkele
 * [new ref]         86f6c66ddb7da0ac7d08e9ed2d3d43e4490ad453 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86f6c66 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild