No problem, there should be no current on the ground wire,
feel free to disconect the wire, do your repair and put it back.
As long as your electrical system is in working order you will have no problems.
That being said, several years ago I did a bathroom remodel, as I cut out the old piping the blade on my sawsall started to arc. Bad....
After fighting with it a week, I called an electrician, $250 later he said that he did not know what was wrong, panel wiring all looked good.
A call to the utility company and as the guy walked up he looked at the service feed and noticed that a squirel had nawed through the ground conductor on the feed from the utility pole to the home.
Rats with furry tails....