@alonadoni You can reset your breath at the bottom of the movement. Take in a breath at the bottom, then push through to the top of the movement. Breath out at the top, then bring the weight back down. Once you're back in the bottom position (with the bar across your shoulders) you can reset your breath by breathing in again and keeping everything tight.
That would be if you're doing paused reps. If you're doing continuous reps, then yes you can reset your breath at the top of the movement with the bar above your head.