> Before disabling any content in relation to this takedown notice, GitHub
> - contacted the owners of some or all of the affected repositories to give them an opportunity to make changes.
> - provided information on how to submit a DMCA Counter Notice.
Unless i'm mistaken about the law[0], they can only restore it after 10 business days to give the legal team of HackerRank (the claimant) time to file suit.
See https://github.com/github/dmca/pull/10944:
(Disclosure: I work at GitHub)