Scrapers scrape every link they can find.

The git host example is probably the one which Anubis is the dumbest defense for: the main reason to have those links is for easy machine interaction. So that's dead when you implement it.

So why even host the links? It's a git repo: send them a local got client and let them clone the repo in browser or something.

The main reason to have those links is for people to click on them. No sensibly programmed machine is scraping diffs from a git web front end.