I did a merge to get a PR ready (https://github.com/bldrs-ai/conway/pull/271/files) and I think yarn setup pulled in a submodule update. This is in a clone of main repo, not a fork.

I can't figure out how to reset the merge to origin/main's conway-geom pointer.

Here's what CG says, and it makes sense to me, but it doesn't work:

> git ls-tree origin/main dependencies/conway-geom
160000 commit 11202215be0c6e2f16ce0bc584c5cefaaec81fe8	dependencies/conway-geom
> git update-index --cacheinfo 160000 11202215be0c6e2f16ce0bc584c5cefaaec81fe8 dependencies/conway-geom
> git add ... ; git commit ...

And this is indeed what the head version is at

And then verify with a delta to head. EXPECTED: no diff. ACTUAL: still the wrong pointer: