If you didn't have this problem before you got new brakes, then you should check with the installer to make sure that everything is properly assembled. If you did have this problem before you got new brakes, then it would be a good idea to check control arm bushings and the suspension. A jerk could be caused by an engine performance issue, but since you mentioned a clank as well I would assume it's more physical in nature.
The vehicle was making this sound before I replaced the rear brakes and rotors. I also replaced the front left axil (as we saw it was bad/leaking). The vehicle make this sound before all these repairs. The vehicle makes this sound as you have your foot on the break and when you come to a complete stop - it clanks or jerks. If you coast to a stop it 9 out of 10 times does not make this sound. Does not do it in reverse.
Did you already have the front brakes inspected? During the brake inspection we measure the pad thickness on both sides as well as on the inside and outside of the rotor. If the measurements and extremely uneven then it may indicate the calipers are not operating properly. There often is 1-2mm difference in normal pad wear. If you need a Volvo shop you may schedule an appointment here, anytime.