Revert "Backported baa3469: In 'babushka update would fast forward', check for unpushed commits against the corresponding remote branch, not the branch that we're about to switch to."
Revert "Backported baa3469: In 'babushka update would fast forward', check for unpushed commits against the corresponding remote branch, not the branch that we're about to switch to."

This reverts commit 210c2f93bb3ad514a81d9af3126d97a636050396.

victorklos/babushka,victorklos/babushka,victorklos/babushka