Addressing review comments. Added tests and some style changes

ee/lib/gitlab/geo/git_push_ssh_proxy.rb

@@ -110,7 +110,7 @@ module Gitlab
       end
 
       def auth_scope
-        URI.parse(primary_repo).path.gsub(/(^\/|\.git$)/, '')
+        URI.parse(primary_repo).path.gsub(%r{^\/|\.git$}, '')
       end
 
       def get(url, headers)

ee/spec/lib/gitlab/geo/git_push_ssh_proxy_spec.rb

@@ -70,11 +70,17 @@ describe Gitlab::Geo::GitPushSSHProxy, :geo do
         let(:info_refs_http_body_full) { "001f# service=git-receive-pack\n0000#{info_refs_body_short}" }
 
         context 'authorization header is scoped' do
-          it 'returns a Gitlab::Geo::GitPushSSHProxy::APIResponse' do
+          it 'passes the scope when .info_refs is called' do
             expect(Gitlab::Geo::BaseRequest).to receive(:new).with(scope: project.repository.full_path)
 
             subject.info_refs
           end
+
+          it 'passes the scope when .push is called' do
+            expect(Gitlab::Geo::BaseRequest).to receive(:new).with(scope: project.repository.full_path)
+
+            subject.push(info_refs_body_short)
+          end
         end
 
         context 'with a failed response' do