The autobuilder layer implementation requires all layer repos to have the same branch names. I did a first pass on how this should be done, both from the webpage (dynamic layering) and the yoctoABConfig, but final implementation needs to be worked out. There is at most a week or so worth of work/testing here, but, with very different layering requirements (meta-intel contains multiple layers for instance), I need to spend a bit of time on this so that it's right.