title: Search the commit with the same file
body: <p>I have two repos. 
  First of them is a fork of second.
  I need move some changes from one repo to another.</p>
  
  <p>So cherry-pick looks like a good idea.</p>
  
  <p>After:</p>
  
  <pre><code>git add remote A &lt;path to second repo&gt; 
  git fetch A
  </code></pre>
  
  <p>I got one repo with complicated history and branches structure.
  I can use cherry-pick now. But i need to find point of difference.</p>
  
  <p>Actually I can use something like this:</p>
  
  <pre><code>git diff HEAD:/some/file/with/changes &lt;SHA&gt;:/some/file/with/changes
  </code></pre>
  
  <p>to see difference between one file in different commit. In this way I can try to find location without difference in this file (using different SHA). But it takes a lot of time.</p>
  
  <p>Can git do it automatically?
  So the main question: how find commit in different branches with the same file in Git repo. </p>