- - in dopush (?), we need to sort out synthetic fast forard
- this should not depend entirely on quilt mode
- but will always be needed if quiltmode_splitbrain
-
- We want a --overwrite=VERSION option which 1. adjusts
- the version used above, and 2. does the same thing in any
- quilt mode. If no split brain it should make the psuedomerge
- on the user's HEAD.