title: Switch branch name on SourceTree
body: <p>I was learning how to use SourceTree and git, and after experimenting I accidentally made a commit in the wrong branch, and it seems like my <code>master</code> branch is no longer the main branch.</p>
  
  <p><a href="https://i.stack.imgur.com/fziJ1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fziJ1.png" alt="Picture of my SourceTree graph"></a></p>
  
  <p>Here is an image of what my graph currently looks like. 
  I was wondering it is possible for me somehow make <code>bugfix-z</code> branch my <code>master</code> branch</p>