Why use fnmatch to match absolute paths instead of relative path?

[Xyc2016]

I am not familiar with system programming. And I want to rewrite the tool in Rust.
I am confused, why just

fnmatch(entry['src_path'], pattern)

instead of

fnmatch(normalize_path(entry['src_path'], relative_to=git_root), normalize_path(pattern))

[hallettj]

I think matching on relative paths is better - it looks like this was an oversight on my part