$ git clone -n https://src.fedoraproject.org/rpms/erlang-merge_index.git /var/lib/mock/f29-build-6629-1629/root/thebuilddir/tmp/scmroot/erlang-merge_index
Cloning into '/var/lib/mock/f29-build-6629-1629/root/thebuilddir/tmp/scmroot/erlang-merge_index'...
$ git reset --hard 5c123d02e5b35117ab5b2c9f375462f8cff5d03e
HEAD is now at 5c123d0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild