$ git clone -n https://src.fedoraproject.org/rpms/libmediaart.git /var/lib/mock/f45-build-16538-487/root/chroot_tmpdir/scmroot/libmediaart
Cloning into '/var/lib/mock/f45-build-16538-487/root/chroot_tmpdir/scmroot/libmediaart'...
$ git fetch origin 1fc4bcb7f7820833577bebee9b595598461199b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmediaart
 * [new ref]         1fc4bcb7f7820833577bebee9b595598461199b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fc4bcb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild