Wrap commit messages on `git commit -m`

Hi,

Some of my colleagues are lazy to fire up an editor and write proper commit messages- they often write one-liners using `git commit -m`. However, that line turns out to be longer than 72 characters, and the resulting `git log` output is ugly. So, I was wondering if it would be a good idea to wrap these one-liners to 72 characters automatically.

Thanks.

Ram