Function scripted_fixture_writable_with_post_with_git_version 

pub fn scripted_fixture_writable_with_post_with_git_version<T>(
    script_name: impl AsRef<Path>,
    version: u32,
    post_process: impl FnMut(FixtureState<'_>) -> PostResult<T>,
    is_git_version_compatible: impl FnOnce((u8, u8, u8)) -> bool,
) -> Result<Option<(TempDir, T)>>

Like scripted_fixture_writable_with_git_version(), but runs a Rust closure after the script completes.