$ git clone -n https://src.fedoraproject.org/rpms/lv2-mdaEPiano.git /var/lib/mock/f45-build-17769-504/root/chroot_tmpdir/scmroot/lv2-mdaEPiano
Cloning into '/var/lib/mock/f45-build-17769-504/root/chroot_tmpdir/scmroot/lv2-mdaEPiano'...
$ git fetch origin 52e30b791bb6d5598be2d0c075464d6e0db1fce7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lv2-mdaEPiano
 * [new ref]         52e30b791bb6d5598be2d0c075464d6e0db1fce7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52e30b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild