git-commit feature request: pass editor command line options

I'd like to be able to have git-commit pass the commit-message editor command line options which aren't passed to the editor for other usages. Right now I have "co" aliased to "!sh -c 'GIT_EDITOR=git-commit-editor git commit'", where git-commit-editor is a wrapper around my editor-of-choice which passes the editor the command line options I want, but it'd be simpler and cleaner if I could just set "commit.editor_options=-BAR". Or even let there be a separate editor for commits, so I could do "core.editor=foo" and "commit.editor=foo -BAR".