Need to push fridge back but don't want to squish water line
If the arrangement is typical, it will look something like this:


Perhaps from this, you can see how the copper tubing can be bent to be flat against the wall and form a coil like this:


Arranged this way, it is okay to move the fridge all the way back, pressing the tubing into position&mdash;which helps keep it from rattling.  There should be no sharp or pointed surfaces on the lower back of the refrigerator.  If there are, maybe you can cover them with heavy tape or cloth.