Running cvsimport with bogus arguments gives an usage message including -a, which is gone (at least the latest man page doesn't mention it anymore).
Besides, running git-cvsimport in something that isn't a repo gives the (useless) error message:
CVSROOT needs to be set at /home/vonbrand/bin/git-cvsimport line 105.
-- Dr. Horst H. von Brand User #22616 counter.li.org Departamento de Informatica Fono: +56 32 2654431 Universidad Tecnica Federico Santa Maria +56 32 2654239 Casilla 110-V, Valparaiso, Chile Fax: +56 32 2797513