Any GitHub wiki can be cloned by appending wiki.git
to the repo url, so the clone url for
the repo https://myorg/myrepo/
is: [email protected]/myorg/myrepo.wiki.git
(for ssh) or https://github.com/my/myrepo.wiki.git
(for https).
You make edits, and commit and push your changes, like any normal repo.
You need to clone the wiki repo and edit it on your system.