That's the role of the commit title, with tags if you follow https://www.conventionalcommits.org/ standard.

99% of commit description will never be read. Only the title is usefull when you scroll to a git log.

But, for the remaining 1%, it means you ended up doing a git blame, git bisect or any funky stuff like this to troubleshot a bug. And when you find the commit that introduced the regression, written by some dude that leaved the company 5 years ago and see a description like "Add the whatever method in whatever class that do the stuff explained by the doc written in the file"... Well, thanks bro. But why did you do this ?!!!