If I fork repository joe/foo, and it has a Wiki, I won\'t get the wiki. Right now I\'m just interested in forking the wiki to add pages to it.
joe/foo
You can't fork it directly on GitHub, but you can get Git access to it by going into the Git access tab of the wiki and you should be able to fork it on your local machine and edit it as much as you want (and even get updates to it!)