Since I seek out horses with a lot of go and have them conditioned to do distance rides. They just don't tire out and settle down very fast. So I have had to teach mine to go the speed I select and to follow. It is a hard lesson for some horses to learn, especially those with a lot of energy and go.
Spend the time and energy on several rides bringing up the rear. Be the last horse so you don't disturb others in front of you on the ride and yes, you will be fighting the jigging. Keep the horse occupied, If that means lots of lateral or vertical gives, half halts, side passes, circles, dancing with bushes, what ever it takes to keep your horses attention. The more he jigs, the more I work him, when he calms, we just walk and follow the leaders in front. They will learn it is less work to calm down and just follow.