Depends on the bush. Hazelnut, blueberry, blackberry, and many other is does not matter. You can just add soil to the those and the part that you bury will just root. Its called stool layering. Other plants its no no. If you are talking about a complete re hugel, it would just be a replant. Thats not a big deal for hardy bushes, but I guess that depends on the size of the bush.
RE: Hugelkulture bed examination.