PL/SQL :: Copying A Tree Structure

I have a hierarchy tree i query using connect by. The primary key is the up level to other parts. I need to copy the entire tree structure as a new structure.

This will mean renaming the IDs to new unique ID yet keeping the up levels correct.

i.e.

ID DESC UPLEVEL
1   TOP
2   desc2           1
3   desc3           1
4   desc4           3
5   desc5           4
6   desc6           1so if i coped this i would expect
7 TOP
8 desc2 7
9 desc3 7
10 desc4  9
11 desc5 10
12 desc6 7