Even history rewrites would be visible with Github's new Activity tab, e.g., see the two force-pushes in llama.cpp https://github.com/ggerganov/llama.cpp/activity So, while, yes, git history can be rewritten, commits pushed to Github can effectively never be deleted. Personally, I find this to be a downside. Think, personal information, etc. But, in this case, it is helpful. Of course, the repository is suspended right now, so the Activity cannot be checked.