$ git clone -n https://src.fedoraproject.org/rpms/rear.git /var/lib/mock/f29-build-7276-1784/root/thebuilddir/tmp/scmroot/rear
Cloning into '/var/lib/mock/f29-build-7276-1784/root/thebuilddir/tmp/scmroot/rear'...
$ git reset --hard 9746f6cf393c6363335e39557abce32c27e01ebf
HEAD is now at 9746f6c - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild