don't use git commit messages as "dear diary" sort of things.

For example:

"I fixed the button issue on the homepage. Still, need to center the title."

would be better written as:

"fixes button issue on homepage"

Always think about what that commit does to the codebase. This is obviously for single-line commits. I suppose it would be okay to "dear diary" in the commit body. You can provide rationality or context in the commit body.