tree fae6db6ad26069a050f8e7877027503ad71b1c32
parent f525cef02bcbfd87e9d3738aa422d9faa9889c6b
author Jonathan Nieder <jrn@google.com> 1551996657 -0800
committer David Pursehouse <dpursehouse@collab.net> 1574907430 +0900

Require a RevWalk when building CommitData

All callers have a RevWalk conveniently available, so simplify by
assuming one is always present.

Change-Id: I9fc83122c3af2240c9c4e39c585af93496ea17aa