On 07/10/2023 09:20, Junio C Hamano wrote:

* ty/merge-tree-strategy-options (2023-09-25) 1 commit
   (merged to 'next' on 2023-09-29 at aa65b54416)
  + merge-tree: add -X strategy option

  "git merge-tree" learned to take strategy backend specific options
  via the "-X" option, like "git merge" does.

  Will merge to 'master'.
  source: [ref]

We may want to hold off on this as there is a wierd copy-by-value of 
struct merge-options cf [ref]

Best Wishes

Phillip