Note that the wiki dwu script does "git fetch dreamwidth", while swaldman's does not do any explicit fetch. If pull is exactly equivalent to fetch plus merge, I don't get why this would matter.

ETA: Aha, okay, git pull --ff-only is not equivalent to fetch + merge, "it doesn't fetch all upstream commits (just the ones for the branch you're working on)". (Unfortunately the reference for this is a StackOverflow question with an agenda, not official documentation, but oh well.)