My speculation: as Sep. 3rd, the massive military parade in Beijing draw closer, Chinese government appears to be knocking at open source developers' doors, asking for repo removal.

This can be linked to previous takedown of shadowsocks, see this hacker news thread: https://news.ycombinator.com/item?id=10101469

Updated: and DDoS is an option too, https://news.ycombinator.com/item?id=10115513

Almost 4,000 forks at this time, here's an example that appears relatively up to date: https://github.com/hooluupog/goagent

Sort of impossible to take a project down unless Github itself goes around and nukes each and every fork. Though it's now in a thousand different places with no clear maintainer.