a.) make a new branch/merge request for reverting the revert, this will contain 1 commit with 15 files.
b.) checkout that branch locally
c.) follow the guidance in the SO post @avazula linked (https://stackoverflow.com/questions/5669358/can-i-do-a-partial-revert-in-git/23401018) and remove the 13 files who's revert I don't want to undo
d.) commit a partial 'unrevert', containing those two files that should never have been reverted to begin with?