Assigning GUID to duplicates

I know this question has been asked a couple of times on forums but still looking for potential solution:

If I have a set of matched records and instead of merging I need to add a GUID to these matrched records how can I achieve this within MDM. I understand this is achievable via Java API but am looking for an approach within MDM Data Manager/Workflows etc to solve the same.

Any inputs would be appreciated.