Last updated October 31, 2012.
Although master branches are commonly used in the Git world, the Drupal community uses major version branches (e.g., 7.x-1.x) instead, since master could be compatible with D6, D7, or even D8.
In the past, a maintainer may have deleted master or put placeholder files in it to direct development toward the appropriate branch. This is no longer necessary. You can now choose a default.
To set a default branch for your project:
- Edit your project
- Click the "Default branch" tab
- Select the desired branch
- Click Save
The branch you choose will appear by default in your Version control instructions and will be checked out if a visitor clones the project without specifying a branch.