title: commits form merged pull request not showing in master
body: <p>I have merged a pull request to the master branch, now when I checkout to the master branch I can't see the commits done in the pull request, and I lose all work done since the creation of thee pull request. any idea why this is happening and how to get the commits to the master branch?
  NOTE: in the branch which I submitted the pull request form I can see all the commits.</p>