Use repository short name rather than the display name in the prefix.

payload.rb

@@ -44,7 +44,11 @@ def url
   end
 
   def repository_branch
-    %Q[#{repository_name}/#{branch_name}]
+    "#{repository_path.split('/').last}/#{branch_name}"
+  end
+
+  def repository_path
+    repository['clone_url'][/:(.+)\.git$/, 1]
   end
 
   def branch_name

spec/codebase_parser_spec.rb

@@ -14,7 +14,7 @@ def commit_link_for(ref)
     its(:count) { should == 1 }
 
     it 'should mention the project and branch' do
-      subject.first.should be_start_with '[Test/master] '
+      subject.first.should be_start_with '[test/master] '
     end
 
     it 'should return the commit message' do
@@ -35,7 +35,7 @@ def commit_link_for(ref)
     its(:count) { should == 3 } # 2 commits + 1 summary line
 
     it 'should mention the project and branch in each line' do
-      subject.each { |line| line.should be_start_with '[Test/master] ' }
+      subject.each { |line| line.should be_start_with '[test/master] ' }
     end
 
     it 'should return the commit messages' do