> Git desperately needs a layer above the commit that groups related commits together into a semantically commit-like object that you can show in history That'

> Git desperately needs a layer above the commit that groups related commits together into a semantically commit-like object that you can show in history That's what a merge commit does. The first parent is the base commit and the second parent is the head of the branch that was merged into the base branch. So, if you run git log first_parent..second_parent, you would see a list of related commits (related by being in the same branch).