$ git clone -n https://src.fedoraproject.org/rpms/bison.git /var/lib/mock/f29-build-1196-488/root/thebuilddir/tmp/scmroot/bison
Cloning into '/var/lib/mock/f29-build-1196-488/root/thebuilddir/tmp/scmroot/bison'...
$ git reset --hard 643cb613f8db12400920ffe619a66a0472a687d6
HEAD is now at 643cb61 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild