3-start: fixed branch create

lib/release/start.rb

@@ -42,8 +42,7 @@ module Release
       validate_release_branch_does_not_exist(release_branch_from_version(new_version))
 
       git_local_branch_create release_branch_from_version(new_version), release_tag_from_version(version)
-
-      git_push release_branch_from_version(new_version)
+      git_push_upstream(release_branch_from_version(new_version))
     end
 
     private

lib/shared/runnable.rb

@@ -71,6 +71,10 @@ module Shared
       run_cmd "git push origin --tags"
     end
 
+    def git_push_upstream (branch)
+      run_cmd "git push --set-upstream origin #{branch}"
+    end
+
     def git_rebase (branch)
       run_cmd "git rebase #{branch}"
     end