https://superuser.com/questions/163033/pull-for-another-git-branch-without-switching
https://stackoverflow.com/questions/31368434/how-can-i-print-the-log-for-a-branch-other-than-the-current-one
say, we are on the condor branch and want to pull master branch, we could do like:
git fetch origin master:master
and we could graph the master branch as well:
git log master --graph
