diff -r 79b73be4dda5 -r b89a7ef29013 mercurial/bundle2.py
--- a/mercurial/bundle2.py	Wed Feb 21 17:26:22 2018 +0100
+++ b/mercurial/bundle2.py	Wed Feb 21 17:33:00 2018 +0100
@@ -1591,6 +1591,7 @@
         part.addparam('targetphase', '%d' % phases.secret, mandatory=False)
 
     addparttagsfnodescache(repo, bundler, outgoing)
+    addpartrevbranchcache(repo, bundler, outgoing)
 
     if opts.get('obsolescence', False):
         obsmarkers = repo.obsstore.relevantmarkers(outgoing.missing)