That may be possible, but no source had made that claim as far as I know, in this case or any other. Also, Github uses SSL. It would be interesting how they distinguish one user's Github connection from all the others originating in China.

Again, how the Github user was actually located by Chinese police was not disclosed or even discussed here. It's interesting that mentioning this has resulted in two comments by new accounts, solely to blame Chinese authorities as discovering the user on their own, with no evidence for it.