How to lock a sketch to a body

Hello everyone.

Sometimes I have a following problem: supose that I maked a sketch to make a cylinder(sketch 1). From the sketch 1 I make a body.

Now I make a construction plan and make a another sketch (sketch 2). This sketch makes a hole in a very precise position.

Now, suppose that I moved this cylinder. Now, the sketch 2 is not in tha same position in relation to the body. Suppose now that I want to edit this hole.

In this situation there is a problem: how to match this hole with the sketch 2 again?