$ git clone -n https://src.fedoraproject.org/rpms/fluxcapacitor.git /var/lib/mock/f29-build-6534-1600/root/thebuilddir/tmp/scmroot/fluxcapacitor
Cloning into '/var/lib/mock/f29-build-6534-1600/root/thebuilddir/tmp/scmroot/fluxcapacitor'...
$ git reset --hard 5e434f09f8f378c2414e22f3b3f2a3377334271e
HEAD is now at 5e434f0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild