vc-cvs-retrieve-tag
vc-cvs-retrieve-tag is a compiled Lisp function in `vc-cvs.el
'.
(vc-cvs-retrieve-tag DIR NAME UPDATE)
Retrieve a tag at and below DIR.
NAME is the name of the tag; if it is empty, do a `cvs update'.
If UPDATE is non-nil, then update (resynch) any affected buffers.