Forcing GC to always fail

Something of an odd question, but is there something I can do in the configuration for a repository that forces any "git gc" run in that repository to always fail without doing anything? (Ideally I'd like to make "git reflog expire" _also_ fail.)

Background: For Bitbucket Server, we have a fairly recurrent issue
where administrators decide they know how to manage garbage collection
for our repositories better than we do, so they jump on the server and
start running things like this:

git reflog expire --expire=now –all git gc --prune=now git repack -adf --window=200 --depth=200

They then come running to us with their corrupted repository expecting and/or hoping that we can fix it (often without proper backups).

Bitbucket Server itself never runs "git gc" (or "git reflog expire"). We've configured how reflog expiry should be handled, but of course that's overridden by explicit command line options like "--expire=now". We _do_ run "git pack-refs", "git repack" and "git prune" (with various options), so those commands need to continue to work.

Is there anything I can set, perhaps some invalid configuration option/value, that will make "git gc" (most important) and "git reflog" (ideal, but less important) fail when they're run in our repositories? Hopefully at that point customers will reach out to us for help _before_ they corrupt their repositories.

Bryan