I look at past commits probably every week or two to track down why something is the way it currently is. Having said that, I care very little about style and

I look at past commits probably every week or two to track down why something is the way it currently is. Having said that, I care very little about style and grammar of commit messages. Ideally I want them to say why the change was made, what the intended effect was, and where I can look for related work (bugs that tracked the work and have related commits or investigation attached to them, docs, whatever) Hit rate on the information I'd like is not great, but if I get at least one of the three things then it's something I can work with.