It is not a full fork and misses a few things (including the Gist description), but is the easiest way to clone a gist to a regular GitHub repository.
I needed it because somehow pushing to gists was denied without explanation or real GitHub feedback.
Another reason is that regular GitHub repositories show you way more information about the commits than Gists do.
Thanks [Wayback/Archive] Noitidart for asking and [Wayback/Archive] Bruno Bronosky for answering at [Wayback/Archive] Fork Gist to Repo on GitHub – Stack Overflow:
The Wiert Corner - irregular stream of stuff 