$ git clone -n https://src.fedoraproject.org/rpms/libmbd.git /var/lib/mock/f45-build-16529-487/root/chroot_tmpdir/scmroot/libmbd
Cloning into '/var/lib/mock/f45-build-16529-487/root/chroot_tmpdir/scmroot/libmbd'...
$ git fetch origin 1591d79b87f315b892ac12970403d944508b0cf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmbd
 * [new ref]         1591d79b87f315b892ac12970403d944508b0cf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1591d79 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild