Composer not updating recipes if not a git folder

[signmeuptwice]

My project structure is like this:

root folder
.git
docker-compose
app
composer.json

so my git is not located in the app folder but in its parent

My docker app is rooted with the app folder

When I try to update my recipes with docker exec app composer recipes:update it fails with error below

How to fix this; I don't want to have to create a new git inside app; that would be redundant.

Updating recipe for doctrine/annotations...

There was an error applying the recipe update patch
Command "git rev-parse --show-prefix" failed: "fatal: not a git repository (or any parent up to mount point /var/www)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
". Output: "".

Update the recipe by re-installing the latest version with:
  composer recipes:install doctrine/annotations --force -v