title: GitLab rename branch and start over on another
body: <p>I just started on a new project and I'm using GitLab with SourceTree. I had created a branch (origin\master) but I did the mistake of using this branch for my development, so I pushed my first few changes to this branch. Now I learned that this branch should actually have the production version and that an origin\develop branch should be used for development.</p>
  
  <p>Is there any way I can rename the master branch to origin\develop and somehow create a new origin\master branch with the original version of the application?</p>
  
  <p>I'm the only developer in the project so it won't affect anyone. If possible, if you can explain how to do it in SourceTree since I don't use the command line git. I'm more familiar with SourceTree.</p>