Switch to API First (cant make a discussion)

[provenvelocity]

So the current structure of this code uses git clone, as primary way to retrieve the code. For GHEC customers this is a costly call. It can take several ( 4-8 ) API calls and internal cross process calls to get one git clone to function. While the alternative is to use the API call directly to do a clone of a ref only uses one API call and 1 auth call internaly. This is a drastic improvement in the total number of calls.

By switching this will help the load on all GHEC cusomters and also help github.com by reducing all those unn needed calls.

I would propos for all simple calls use api and for all more complex calls and setup's fall back to git clone.

Thanks
Joshua