Because wikis are just Git repositories, you can make changes locally and push them to your repository using a Git workflow.
To restore a wiki:
- Open the panel of the backup, click “download wiki” and choose “current” for the latest backup or any of the snapshots available. The download contains the complete wiki repository.
- Clone the empty wiki of the repository you want to restore into, following the instructions on the GitHub documentation.
Now that you have a local copy of your empty wiki and a local copy from the wiki of your backup, you can simply copy the files from the backup into the empty wiki and commit them.