A lot of git branches contain duplicated commits
Since I rebased a lot of branches from develop instead of from the previous one, a lot of commits are duplicated. That's a problem, because
git-scm book wrote:
You have to merge that work in at some point so you can keep up with the other developer in the future. After you do that, your commit history will contain both the C4 and C4' commits, which have different SHA-1 hashes but introduce the same work and have the same commit message. If you run a git log when your history looks like this, you’ll see two commits that have the same author date and message, which will be confusing
(from redmine: created on 2013-07-10, closed on 2013-07-10)