It would be really hard for them to ban BTC code unless there was some "National Security" label attached to it.
It makes more sense to ban free speech, than code. What is code to be banned? How can you ban, forbid, criminalize something that's free, and can be ran by anyone, at any country, anytime, with little effort? Remove the repository, and be sure that a wave of decentralized Git network will appear. You can't ban restriction-resistant software. You can only prove it's more vital for a free society.