Force loading a pure vimscript plugin

[ViViDboarder]

I'm trying to write a function that will call vim.fn.FugitiveRemote, which is written in vimscript. Normally, I can load Lua plugins using require(...), however this plugin has no Lua modules, so that doesn't work. I can get lazy loading to work with commands just fine, however no such thing exists for functions.

I figured there would be something like require("lazy").load("vim-fugitive"), but it doesn't seem so. I started poking through the code, but I haven't found an obvious API to use.

Any ideas?