Instrument all Gitlab::Git instance methods

config/initializers/metrics.rb

@@ -49,12 +49,14 @@ if Gitlab::Metrics.enabled?
     config.instrument_instance_methods(Gitlab::Shell)
     config.instrument_methods(Gitlab::Git)
-    config.instrument_instance_methods(Gitlab::Git::Repository)
     Gitlab::Git.constants.each do |name|
       const = Gitlab::Git.const_get(name)
-      config.instrument_methods(const) if const.is_a?(Module)
+      next unless const.is_a?(Module)
+
+      config.instrument_methods(const)
+      config.instrument_instance_methods(const)
     end
     Dir[Rails.root.join('app', 'finders', '*.rb')].each do |path|