On Tue, 22 Sep 2015 14:32:19 -0400
Josh Boyer <jwbo...@gmail.com> wrote:

> Please CC me as I'm not subscribed.
> 
> I was hoping someone could help me with the revision shorthand to get
> the commit sha of a commit N commits after the initial commit.

What happens if right after the initial commit, there have been five
branches created -- with no common commits except for the initial one?

That's the core limitation of the data model Git uses (and arguably any
other DVCS system): all commits form a directed acyclic graph.
The "directed" in that construct means that child commits contain a
link to their parent commit (or commits) but not vice-versa.

Hence, given any particular commit, you're able to trace all of its
ancestry, but the reverse is not possible.
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