README.md in git-up-0.5.5 vs README.md in git-up-0.5.7

@@ -34,6 +34,18 @@
 
 If you're even lazier, you can tell `git-up` to run `bundle install` for you if it finds missing gems. Make sure `git-up.bundler.check` is also set to `true` or it won't do anything.
 
 ### `git-up.fetch.prune [true|false]`
 
-By default, `git-up` will append the `--prune` flag to the `git fetch` command if your git version supports it (1.6.6 or greater), telling it to [delete any branches which no longer exist on the remote](http://linux.die.net/man/1/git-fetch). Set this option to `false` to disable it.
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+By default, `git-up` will append the `--prune` flag to the `git fetch` command if your git version supports it (1.6.6 or greater), telling it to [remove any remote tracking branches which no longer exist on the remote](http://linux.die.net/man/1/git-fetch). Set this option to `false` to disable it.
+
+### `git-up.fetch.all [true|false]`
+
+Normally, `git-up` will only fetch remotes for which there is at least one local tracking branch. Setting this option will it `git-up` always fetch from all remotes, which is useful if e.g. you use a remote to push to your CI system but never check those branches out.
+
+### `git-up.rebase.arguments [string]`
+
+If this option is set, its contents will be used by `git-up` as additional arguments when it calls `git rebase`. For example, setting this to `--preserve-merges` will recreate your merge commits in the rebased branch.
+
+### `git-up.rebase.log-hook "COMMAND"`
+
+Runs COMMAND every time a branch is rebased or fast-forwarded, with the old head as $1 and the new head as $2. This can be used to view logs or diffs of incoming changes. For example: `'echo "changes on $1:"; git log --oneline --decorate $1..$2'`