Official Git docs say commit messages should be in present tense and imperative mood:

> Describe your changes in imperative mood, e.g. "make xyzzy do frotz" instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy to do frotz", as if you are giving orders to the codebase to change its behavior.

• GOOD: “Fix app sending unnecessary requests"

• BAD: “Fixes app sending unnecessary requests”

> Another best practice to help you write good Git commit messages is to use imperative verb form. Using imperative verb form ensures that potential verbs used in your commit messages, like “fixed” or “updated” are written in the correct tense to “fix” and “updated”.

I insist on present tense, imperative mood in every codebase I work on. The Git log makes a whole lot more sense when it can be read this way.