> "git rebase" learned to interpret a lone "-" as "@{-1}", the branch that we were previously on.

Cool, I was just looking for something like this with "git merge". Turns out "git merge" already supports it, and I need to get better at using the reflog (@{...}).

> "git add <path>" is the same as "git add -A <path>" now.

> The "-q" option to "git diff-files", which does NOT mean "quiet", has been removed

More intuitive.

> The bitmap-index feature from JGit has been ported, which should significantly improve performance when serving objects from a repository that uses it.

Improves clone performance if you're pulling lots of history, but there still doesn't seem to be a way to sparse-checkout without fetching the entire .git repo.