title: Name only option for `git branch --list`?
body: <p><code>git branch</code> outputs a list of branches, but also outputs other human-oriented fluff such as an asterisk (<code>*</code>) beside the current branch.</p>
  
  <pre><code>$ git branch
  * (HEAD detached at origin/master)
    branch_foo
    some/branch_bar
  </code></pre>
  
  <p>How do I get a more machine parsable output (e.g. just the name of branches) for scripting use etc.?</p>