What's a `WIP` on a stash commit?
<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>