I am away from my keyboard, is this an acceptable excuse for you? It would have taken fewer keystrokes not to compose such a hostile response, while I was just offering a suggestion to OP.
I think your request was tainted by the dig at the longevity of their self-hosted mirror.
Your suggestion not only requires time on mirror operator's part, but puts their GitHub account at risk (no matter how low you consider that risk to be). From what I can see thus far - you care more for a GitHub mirror than GP - who went through the deliberate effort of setting up the mirror away from GitHub.
