title: git cherry pick but recive fatal: Unknown commit pick
body: <p>on my local git have develop branch and feature branch. in  feature branch has three commit with hash code a1,a2,a3. I want to pick a2 to develop branch so i did</p>
  
  <pre><code>- git checkout develop
  - git cherry pick a2
  =&gt; fatal: Unknown commit pick
  - I wrong something ?
  </code></pre>