I put a very long command into my .zshrc, for anyone interested.

But will this work? It seems to me that the objects will remain in the repository on GutHub even when not accessible via a commit, and the old commits will still be linked from the user’s timeline. Unless, of course, the repository is nuked and recreated.

Edit: Ok, I’m stupid, they address it:

but you can permanently remove all of your repository’s cached views and pull requests on GitHub by contacting GitHub support.

I once had a removal request (my old nick was in cached content) and they fixed it immediately.