Yeah, mixed-rev working copies are a huge pain in the rear. They make a lot of problems for conversion tools when you commit from them, I can't imagine writing

Yeah, mixed-rev working copies are a huge pain in the rear. They make a lot of problems for conversion tools when you commit from them, I can't imagine writing a server to deal with them even remotely sanely. What does the Git DAG end up looking like when a commit comes in from a mixed-rev WC? Do you have any examples I can see?