Setting the default branch→
If you have more than one branch in your repository, you can choose another branch to be the default branch.
Viewing branches in your repository→
Branches are central to collaboration on GitHub Enterprise, and the best way to view them is the branches page.
Deleting and restoring branches in a pull request→
If you have write access in a repository, you can delete branches that are associated with closed or merged pull requests. You cannot delete branches that are associated with open pull requests.