While some scars heal remarkably well and others not so much, you can never get rid of linear scarring in the donor area. This scarring is permanent, and a large part of how small or thin it turns out rests in the hands of your surgeon. Most people conceal their linear scar by growing their hair long enough to cover it. A hair transplant repair surgery using a few hundred FUE grafts is an option for filling the scar in the future.
Web reference: http://www.dermhairclinic.com/hair-transplant-repair-2/