$ git clone -n https://src.fedoraproject.org/rpms/gecode.git /var/lib/mock/f29-build-6357-1554/root/thebuilddir/tmp/scmroot/gecode
Cloning into '/var/lib/mock/f29-build-6357-1554/root/thebuilddir/tmp/scmroot/gecode'...
$ git reset --hard b862b60c4fbaa701e605a2d9264fc74026ad2af9
HEAD is now at b862b60 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild