Ground under repair should be designated as such by the course, either by staking, roping or otherwise marking the area affected. Relief is given to any golfer whose ball comes to rest in the area or touching it.
Any hole dug by a greenkeeper, and any material piled for removal by a greenkeeper, is ground under repair even if it is not so marked.
Grass cuttings left on the course are not considered ground under repair unless they are marked as such.
In the rulebook, check Rule 25.

