Function commit 

pub fn commit(
    id: &str,
    summary: &str,
    author: &str,
    email: &str,
    time_seconds: i64,
    time_offset_minutes: i32,
    parents: &[&str],
    refs: &[(&str, RefKind)],
) -> CommitInfo

Build a CommitInfo without the ceremony of naming every field.