As Junio mentioned, "A..B" means all commits reachable from B except those reachable from A. Understanding this is just a way to say "B --not A" is important to know you can take advantage of:
`--boundary`
Output excluded boundary commits. Boundary commits are prefixed with -.
In other words, git log --boundary <older hash>..<newer hash> should give you
exactly what you asked with the small caveat it marks excluded commits
differently.
Cheers,
Rafael Ascensão
