Repository administrators for organizations can enforce branch restrictions so that only certain users or teams are able to push to a protected branch.
On GitHub, navigate to the main page of the repository.
Under your repository name, click Settings.
In the left menu, click Branches.
Under Protected Branches, select the branch you want to restrict using the drop-down menu.
- Select Restrict who can push to this branch.
- Search for and select the people or teams who will have permission to push to the protected branch.
- Click Save changes.