How to work with Wiki repo on GitHub (via API or git)?

I use nodeJS script to fetch information about contributors to my project. And I would do the same to WIki. The API return 404 for wiki repo, so I’ve cloned the repo using but it also is useless because it seems that it only gets new data when it’s cloned. The repo is not updated with new edits when using git pull.

I can use this repo and update the copy at but the Wiki repo is not synched.