Ok, I got the following to work:
[presumes you have ant, maven, jdk, etc, installed]
git clone tools https://github.com/gwtproject/tools.git
git clone https://github.com/gwtproject/gwt.git gwt
ant clean dist-dev -Dgwt.version=2.8.0-SNAPSHOT
[press enter for all defaults]
It now pulls all from sonatype, except for jsinteropt which it pulls
You received this message because you are subscribed to the Google Groups "GWT Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to email@example.com.
To post to this group, send email to firstname.lastname@example.org.
Visit this group at http://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.