The git.nrw service is currently in the pilot phase, which is why not all universities in North Rhine-Westphalia are connected yet. The connection is being done gradually. We regularly provide updates on the git.nrw project on this website, including information about the connection of additional universities.
If your university is outside of North Rhine-Westphalia, it cannot be connected. The service can only be used by external users through a guest account. This guest account requires an invitation to a shared project and is only valid as long as the project is active.