One of the best things you can do for your project is highlight the contributors who are helping make it a success. Every patch counts, and every now and then you get someone in the queue who blows you away with a first patch that traces down some sneaky, hidden bug that you know took hours to track down. Attributing such patches has always been a matter of dropping the contributor's name into a commit message and thanking them in the issue in the past, but thanks to Git on drupal.org there is now a better way.
This may be old news for most folks, but I didn't discover this feature until just a couple months ago. It turns out that user profiles on drupal.org now include a Git attribution heading under which you can find the appropriate command line option to pass to git commit to attribute that user with a patch.
By way of example, I recently committed a patch submitted by svendecabooter. I still formed my commit message using the tried and true format (including both the issue number and his username), but I also added the indicated text to the command:
git commit --author="svendecabooter <email@example.com>" -m "Issue #1197512 by svendecabooter: pass the entity rendering language down to the linked fields when rendering product fields."
Thanks to Git, even though I am the one committing the code, he is the one credited with authorship of it. This is visible both in the log for that commit and on the committers page for Drupal Commerce. Many thanks to the team for working this all out and helping maintainers give credit where credit is due.