Backups include not only the complete repository with it's branches but also the metadata associated with it. That’s a great advantage over other backup solutions or local copies of your git repositories as these do not include metadata like issues, milestones and the like.
The metadata is not part of git versioning and therefore can't be reverted or restored if something goes wrong. That is why we include all data that is available via the GitHub API. This currently includes:
|Pull Requests||Pull requests are included in the backup but can only be restored as issues due to limitations of the GitHub API.|
|Wiki||Full backup of all wiki branches. Due to limitations of the GitHub API it can't be restored automatically. However a manual restore is possible.|
Having backups of your metadata is important, especially if you use them for project management. They preserve valuable information which has been collected inside of issues or pull-request.
This information can also be found in the FAQ.