List files with git ls-files from root instead of current working directory -

i'm looking command similar following, lists repository root, rather current working directory:

git ls-files --cached --others --exclude-standard

if possible i'd rather not use bash/batch, since i'm looking cross-platform solution.

if can create alias,

git config --global alias.ls-files-root "! git ls-files"

then should able do

git ls-files-root --cached --others --exclude-standard

explanation: aliases starting '!' executed shell commands top-level directory. related: is there way git root directory in 1 command?.

Braziel