Some of my hunter rotary spray heads are about 2" below ground level.

I recently purchased this house and have no idea why some rotay spray heads are about 2" below ground level.

I had to dig around the spray head to make some clearance for the pop up.

The ones where I had to dig now look like golf course holes.

Is there a way to fix this problem without digging up the entire lines?

Do they make any type of extensions for the rotary spray heads?