Confirmed, they are still having issues in their systems:
fatal: remote error: GitHub is temporarily limiting some unauthenticated downloads to protect the stability of the platform. Please retry later or authenticate.
could not read Username for '``https://github.com/``': No such device or address
This time not published on https://www.githubstatus.com/ but with the same impact as the August incident.
Perhaps it is time to move to Gitlab.