You can have head branches automatically deleted after pull requests are merged in your repository.
Anyone with admin permissions to a repository can enable or disable the automatic deletion of branches. Branch protection rules and repository rules can also prevent branches being automatically deleted. For more information, see " About rulesets " and " About protected branches ."
On GitHub.com, navigate to the main page of the repository.
Under your repository name, click Settings . If you cannot see the "Settings" tab, select the dropdown menu, then click Settings .
On the "General" settings page, you can find a section called "Pull Requests". Under "Pull Requests", select or deselect Automatically delete head branches .
