git merge - git mergetool reports "No files need merging"

Question

For some reason lately, every time I pull and get a merge conflict, running git mergetool reports "No files need merging":

$ git pull
First, rewinding head to replay your work on top of it...
Applying: replaced home button with Cancel
Using index info to reconstruct a base tree...
Falling back to patching base and 3-way merge...
error: Your local changes to the following files would be overwritten by merge:
    Classes/Controllers/HomeController.m
Please, commit your changes or stash them before you can merge.
Aborting
Failed to merge in the changes.
Patch failed at 0002 moved rollback into cancel button in log watching

When you have resolved this problem run "git rebase --continue".
If you would prefer to skip this patch, instead run "git rebase --skip".
To check out the original branch and stop rebasing run "git rebase --abort".

$ git mergetool
No files need merging

If I run git rebase --abort and pull again, either the same thing happens on a different conflict, or the pull succeeds with no merge conflict. There are no remote changes between these pulls, so it's not as though the conflict went away.

Here's how this branch and the remote are configured:

[branch "develop"]
        remote = origin
        merge = refs/heads/develop
        rebase = true
[remote "origin"]
        url = <my repo url>
        fetch = +refs/heads/*:refs/remotes/origin/*

Answer 1

This fixed it for me:
git mergetool .

I found this fix here