This news about attack make me wonder why isn't GitHub just blocked these repositories for all Chinese IPs. It's would be logical after they censored certain repositories for Russian IPs:
https://github.com/github/roskomnadzor
Just in case anyone who try to access repos from Russia get something like that:
And no I'm don't support any of this and strictly against any censorship, but still it's looks weird why GitHub agree to deal with Russians, but not Chinese.