Function normalize_worktree_file_path_with_git_dir 

pub fn normalize_worktree_file_path_with_git_dir(
    file_path: &str,
    work_tree: &Path,
    prefix: Option<&str>,
    git_dir: Option<&Path>,
) -> String

Like normalize_worktree_file_path, honoring core.precomposeunicode argv normalization for git_dir.