https://github.com/search?q=retard&type=Code&utf8=%E2%9C%93
Not sure what made this particular case different.
As a side question, shouldn't it be fairly easy to flag those repositories and then sort through those who have it as an offensive word list and those who are just being derogatory?
"Git is a mild pejorative with origins in British English for a silly, incompetent, stupid, annoying, senile, elderly or childish person. It is usually an insult, more severe than twit or idiot but less severe than wanker, arsehole or (redacted)."
Source: https://en.wikipedia.org/wiki/Git_(slang)
ps. Yes, I'm a prude. And yes, I redacted a word from the Wikipedia definition above.
That said, I find this whole thing to be silly. What can you possibly get out of choosing to be the word police?
It's common, except it's a verb, no? As Larry the Cable Guy would say, "git r done".