title: Get code from git base on commit id
body: <p>I'm using git and bitbucket.  Please guide me a way to download or pull all code base on commit id. 
  Eg commit ids are "1", "2", "3", I want dowload code from "1" and "2".</p>
  
  <p>Please help!</p>
  
  <p>Thanks a lot</p>