One approach is to make every rep as much the same as every other rep. This is not my preferred approach early in a training cycle.
An alternative is to take your earlier squats on any training day that's not near a competition or max test, and perform them with lighter weights, much deeper than competition, just below parallel depth, and more speed of execution. This is what I prefer. I start with light weights, maximum depth, and quick speed, and as I move through my session, the weights get heavier, the depth gets less, and the movement speed slows down. I do these things because, frankly, I'm not much of a squatter and I feel like I benefit from this approach. That said, as a competition or max test grows closer, I do less warming up and more of a competition style squat in order to have the time to hone that groove and be ready to use it on test day.