Provided by: git-man_2.17.1-1ubuntu0.18_all 

NAME
git-merge-one-file - The standard helper program to use with git-merge-index
SYNOPSIS
git merge-one-file
DESCRIPTION
This is the standard helper program to use with git merge-index to resolve a merge after the trivial merge done with git read-tree -m.
GIT
Part of the git(1) suite Git 2.17.1 04/26/2023 GIT-MERGE-ONE-FIL(1)