[nicknyc]

"didn't want to change and have to learn something new"

Resistance to change might be an authority thing - you could just walk around this troll's bridge and see what happens. Try talking to his boss or higher about source control, casually. If his manager asked him to change to GIT he would do it. He might have dismissed you because he believes you're not in a position of power over him or the work required to switch is mundane.