cvs-set-branch-prefix
cvs-set-branch-prefix is an interactive compiled Lisp function in `pcvs.el
'.
(cvs-set-branch-prefix ARG)
Set the branch prefix to take action at the next command.
See `cvs-prefix-set' for a further the description of the behavior.
C-u 1 selects the vendor branch
and C-u 2 selects the HEAD.