Maybe the right thing to do is add a new "fossil glob CMD ARG1 ARG2 ...." command.  The glob command applies file globing to all arguments, then runs CMD with the globed arguments.  This is similar to how the "glob" command worked in very early Unix systems, before globing got built into the shell.

Unix, Msys, and cygwin shells would continue to operate normally.  Users on a windows shell, however, would need to add the "glob" keyword if they want globing to occur in their command.