Make git ls-files omit deleted files

Hello,
I'm trying to copy my current git worktree to a new directory, while
including all modified and untracked files, but excluding any ignored
files. I essentially want a copy of the tree assuming someone ran `git
add --all && git commit` and cloned that commit into a different
directory.

I got pretty close with the following command:

    $ git ls-files --cached --modified --others --exclude-standard
--deduplicate | xargs cp --parents --no-dereference
--target-directory=/tmp/clone/

The problem is that if I have an unstaged delete, `ls-files` will
print it out as a modification and `cp` will print an error saying
that it failed to copy the non-existing file.

The man page states this behavior:

--modified: Show files with an unstaged modification (note that an unstaged deletion also counts as an unstaged modification)

Is there another way to achieve what I'm doing that's not too
expensive? If not, could a `--no-deleted-as-modified` flag be added?

Thanks,
Raul