Git is powerful in many ways. One of the most powerful features of Git is that it has immutable history. This is powerful because nobody can squeeze something into the history of Git without it being noticed by the people who have cloned the repository. This also causes some challenges for developers as some developers would like to change the commit messages after a commit has been released. This is a feature that is possible in many other version control systems but because of the immutable history with Git, it has Git notes, which is essentially an extra refs/notes/commits reference in Git. Here, you add additional information to the commits that can be listed when running a git log command. You can also release the notes into a remote repository so that people can fetch the notes.