create integration tests for git

[c0rydoras]

What to do

• create a repo locally in a temporary directory
• add a poetry.lock/pnpm-lock.yaml/yarn.lock into there
• add that repo and sync it (file://{repo.absolute()})
• make changes to it
• assert that those changes are synced (e.g. new commits)

Reasons for this

Current implentation cannot handle updates to the repo, we need to pull as well