"Elijah Newren via GitGitGadget" [off-list ref] writes:
Here are some patches to add a --remerge-diff capability to show & log,
One sad omission from the maintainer usecase is that we do not seem
to know "git diff --remerge-diff" yet during a conflicted merge.
"git diff [-- <path>]" before recording the resolution for the path
with "git add <path>" shows combined patch to give a final sanity
check before committing it to the rerere database. I am wondering
if viewing it in the --remrege-diff format instead would help this
step even more.