svnadmin setuuid — Reset the repository UUID.
svnadmin setuuid REPOS_PATH [NEW_UUID]
Reset the repository UUID for the repository located
NEW_UUID is provided, use
that as the new repository UUID; otherwise, generate a
brand-new UUID for the repository.
If you've svnsynced
/var/svn/repos-new and intend to use
repos-new as your
canonical repository, you may want to change the UUID for
repos-new to the UUID of
repos so that your users don't
have to check out a new working copy to accommodate the
$ svnadmin setuuid /var/svn/repos-new 2109a8dd-854f-0410-ad31-d604008985ab
As you can see, svnadmin setuuid has no output upon success.