Python module names with a custom prefix

We are working on a project in which we are packaging Python modules outside of openSUSE & SLE, using Open Build Service. In some cases, we have found ourselves in need for packaging a different version of a package name which is already included in openSUSE and/or SLE. We would like to use python-rpm-macros but we are finding issues with this part:

BuildRequires: %{python_module foo >= version}

It would resolve to the following, per version of pythons:

BuildRequires: pythonX-foo >= version

We would like to be able to have a way to specify a custom prefix for these packages, so that the package names do not conflict with the openSUSE & SLE package names.

Start in the Lua implementation of the python-rpm-macros generator and trace how %{python_module foo >= version} becomes per-Python BuildRequires names. Define how a custom prefix should be specified, then verify that generated package names use it without conflicting with openSUSE or SLE names.