Happened to me too, after I published my book criticizing Russia:
https://github.com/saniv/text/blob/master/one-life-in-russia...
Hi Nikita,
Thanks for writing in. Your repositories were set to require a login to view following
multiple reports from users concerned about their contents. This was done as an
alternative to hiding or disabling the content entirely.
Thanks,
GitHub Support
Russians support freedom of speech that much.