git‐merge‐tree − Show three−way merge without touching index

git merge−tree <base−tree> <branch1> <branch2>

Reads three tree−ish, and output trivial merge results and
conflicting stages to the standard output. This is similar
to what three−way git read−tree −m does, but instead of
storing the results in the index, the command outputs the
entries to the standard output.

This is meant to be used by higher level scripts to compute
merge results outside of the index, and stuff the results
back into the index. For this reason, the output from the
command omits entries that match the <branch1> tree.

Part of the git(1) suite