title: remove a file from git commit
body: <p>I have done something like this:</p>
  
  <pre><code>1. git add .
  2.git commit
  </code></pre>
  
  <p>thus commiting a video file of 200mb which i then tried to remove by deleting the video file and repeating step 1 and 2, but that did not helped either, then i tried googling which ended up with running these three commands</p>
  
  <pre><code>1.git add -u
  2.git reset HEAD path/to/file
  3.git commit
  </code></pre>
  
  <p>thus i am on 3rd commit, still unable to push as my video file is still somewhere in commit.. what should i do to get out of this mess !</p>