No, the message should tell the why of the change, if you don't know you risk doing a fix that is simply removing the change and then you are back at the issue that motivate such change in first place. This is even harder if the person put the commit along others that are merged separately or worse, work directly on the main/master branch. I've been there a lot, it's not hard to write a good commit message, if you're in a project and everyone does their part except that one programmer, you will notice a lot every time a bug turns out to be introduced by that one person.