[runwhen-local-feedback] git cache needs refreshing for long running instances

[stewartshea]

Observation
While we warm up a git cache of codecollection repos to speed up rendering, if the cache exists on first run, whatever is in place gets used. We need to check if there are any updates, otherwise we end up with stale codecollection data.

Possible Suggestions
Simply perform a git pull if the directory exists on warmup. This happens during every render, so it should suffice.

Any other details or context