Commit messages and code comments serve different purposes. The commit message should be about what you changed, so they help you find the interesting commit from a list of commit messages, whereas comments in the code should be about why the code is the way it is. Is it because of a bug in a library? Is it arbitrary? A quick fix that still has some debt? Did someone waste a lot of time on this?

Commit messages are about the change, whereas comments are about the state of the code.