$ git clone -n https://src.fedoraproject.org/rpms/libmng.git /var/lib/mock/f45-build-16564-487/root/chroot_tmpdir/scmroot/libmng
Cloning into '/var/lib/mock/f45-build-16564-487/root/chroot_tmpdir/scmroot/libmng'...
$ git fetch origin d2d7de7d1d32b78309de8156d569305f74523691:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmng
 * [new ref]         d2d7de7d1d32b78309de8156d569305f74523691 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2d7de7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild