title: What's a `WIP` on a stash commit?
body: <p>What's a <code>WIP</code> means on a stash commit?</p>
  
  <pre><code>$ git stash list
  stash@{0}: WIP on master: 049d078 added the index file
  stash@{1}: WIP on master: c264051 Revert "added file_size"
  stash@{2}: WIP on master: 21d80a5 added number to log
  </code></pre>
  
  <p>I'm just curious.</p>