> "git oldest-ancestor brancha branchb" does what it says. The oldest (common) ancestor of two revisions would typically be the initial commit. I assume your a

> "git oldest-ancestor brancha branchb" does what it says. The oldest (common) ancestor of two revisions would typically be the initial commit. I assume your alias really finds the last (most recent) common ancestor. But are you aware of the `git merge-base` builtin? Your alias looks an awful lot like it.