I think the golden rule here is to only work directly with the repo on a single device. Otherwise there is a lot of useless churn and more potential for conflicts.

If you want to work with it on multiple devices, you can still sync it around, just work with a new clone of that repo rather than modifying it directly from multiple places. Then push your changes into the synced repo and act like it's really remote instead of local.

This does use more storage, however.