$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-io.git /var/lib/mock/f29-build-6399-1567/root/thebuilddir/tmp/scmroot/gap-pkg-io
Cloning into '/var/lib/mock/f29-build-6399-1567/root/thebuilddir/tmp/scmroot/gap-pkg-io'...
$ git reset --hard ac5a135a2a5a35da2e29c9d16747da33f9233b65
HEAD is now at ac5a135 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild