Fast Forward

With Fast Forward merge git history is a straight line without the need for a new merge commit. This strategy is the default one (but only when possible). Fast Forward strategy occurs in the case when you create a new branch e.g. feature from master branch and you make a few commits on feature branch, and by the time you are ready to merge those commits into master there is no any new commits on master branch and all that git has to do is to move the HEAD pointer forward to the target branch. Let's see this on the image bellow.

Let's see what is happening in git log using this cool script git-log.sh (You can find script here)

Thanks Max Maintz for providing this cool script.