About changing the default branch
You can choose the default branch for a repository. The default branch is the base branch for pull requests and code commits. For more information about the default branch, see "About branches."
Note: If you use the Git-Subversion bridge, changing the default branch will affect your trunk branch contents and the HEAD you see when you list references for the remote repository. For more information, see "Support for Subversion clients" and git-ls-remote in the Git documentation.
You can set the name of the default branch for new repositories. For more information, see "Managing the default branch for your repositories," "Managing the default branch name for repositories in your organization," or "Enforcing a policy on the default branch name."
必要な環境
To change the default branch, your repository must have more than one branch. 詳しい情報についてはリポジトリ内でのブランチの作成と削除を参照してください。
Changing the default branch
- GitHubで、リポジトリのメインページにアクセスしてください。
- リポジトリ名の下で Settings(設定)をクリックしてください。

- 左のメニューでBranches(ブランチ)をクリックしてください。

- Under "Default branch", to the right of the default branch name, click .

- Use the drop-down, then click a branch name.

- [Update] をクリックします。

- Read the warning, then click I understand, update the default branch.
