Ask HN: Git Training Course Recommendations?

I'm very familiar with git, but many of my coworkers are not primarily software developers and only know the basic commit/push/branch workflow, and delete/re-download the repo whenever something goes wrong.

I have been given the opportunity to recommend a training course for everyone (less than a dozen individuals) to go through to get them up to speed with git. While I know of fantastic self-guided options like Git Immersion and Pro Git, I want to make sure I recommend one that looks good on paper to management. I imagine they would prefer something with completion verification, like a quiz or exam.

If anyone has been in a similar situation, or has a recommendation for a course like this, I would greatly appreciate some guidance.