This fix involves liquify, and is the same as this method.
First select the whole hair area and put it on its own layer, then put a blank cloning layer below that. Clone the bricks in far enough to cover all the hair that will be shrunk:
Return to the top layer and enter Liquify. Mask his face and the base of his hair, so that it doesn't get moved by the liquifying:
Using a big brush with the Forward Warp Tool, gently nudge the hair in. Of course it will make the wall all bendy, but that doesn't matter:
When you've finished liquifying press OK to return to Photoshop, where your file will look like this:
Then add a mask to the liquified layer and mask out the bendy wall: