title: bitbucket - can not see commit of merged branch
body: <p>My Company hosted code on bitbucket - Git.  The way we work is create branch for every issue, individual person work on that branch. Once work done he raise Pull Request. Before raising PR, he rebase code with master branch. Other people in team review his PR &amp; then approve it. Once PR approve, same individual merge it to master branch</p>
  
  <p>I created branch on 2nd June &amp; PR was merge on 14th June.  Branch had 3 commits in 3 different files. Subsequently other developer's branch was merge on 26th June. He also work on 2 files, which I change.  Now after more than month, when I check file history, I dont see my commit there.    Out of 3 files I change, only 1 file changes are there &amp; they show correct commit number. And other 2 commits not showing in file history. I can guess, my changes been overridden, but git history for file, must show the commit.</p>
  
  <p>Is anybody have idea, how it can be happen. I mean how commit been vanished for particular file in git history.</p>
  
  <p>Thanks
  Aniruddha</p>