Add as copy?

Hi all,

We use our SVN repository mostly for binary files and it happens quite 
often to have the same file contents at different paths/names 
(intentionally). We do not use SVN commands to create copies, but just 
copy them using normal file operations.

Is there a command that compares the hash of the file to add with the 
ones of existing tracked files and instead of adding a new file, just 
marking it as a copy of another?

-- 
Thomas