If you manage a lot of Git repositories (or other, but Git is a specific and common technology), it could happen that depending on users there will be quite different usage profiles. On the worst case end you could face issues with broken repositories (unplanned work, risks) and wasted storage (which is claimed to be cheap but is still accounted for).
Who is responsible for imposing minimum acceptance criteria for "quality of usage" (I cannot find better term for now) and what are realistic quantifiable measures you could install and link to actionables?
Examples of anti-patterns and related risks you might be dealing with:
Folks upload files, also binaries, which are neither part of the software nor test documents
Binary libraries instead of using dependency management
Repos become too big (over 15G as stated here )
Repos are below 15G but the history is many gigabytes
Or, should anybody care about these things at all? (formal objections, not opinions, why not care)