The move came back to hurt the Jazz after the unheralded Jerebko scored the game-winning tip-in to lift the Warriors to a 124-123 victory in Utah on Friday.
"That's the moment where he's one of us," Warriors coach Steve Kerr said, according to ESPN's Nick Friedell. "Any time you're a new guy with a team, you're trying to make your mark. You do it in practice by going hard. You do it with your work ethic.
"But as soon as you hit a game winner, that pretty much solidifies."
Jerebko finished the contest with 10 points and six boards in 24 minutes and was fortunate to close the game against his former team alongside All-Stars Stephen Curry, Klay Thompson, Kevin Durant, and Draymond Green.
"It felt great," Jerebko said. "Obviously, being back here - I had a great time here. So to come back - said I wanted a win, so it felt great."
The Warriors are 2-0 to start the season and will face the Denver Nuggets next on Sunday.