pre-receive: Fix undefined local variable error

This was broken during the refactor in c658360e.

hooks/pre-receive

@@ -9,7 +9,7 @@ protocol = ENV.delete('GL_PROTOCOL')
 repo_path = Dir.pwd
 gl_repository = ENV['GL_REPOSITORY']
 
-def increase_reference_counter(gl_repository)
+def increase_reference_counter(gl_repository, repo_path)
   result = GitlabNet.new.pre_receive(gl_repository)
 
   result['reference_counter_increased']
@@ -28,7 +28,7 @@ require_relative '../lib/gitlab_net'
 # and we don't want to skip it if the custom hook fails.
 if GitlabAccess.new(gl_repository, repo_path, key_id, refs, protocol).exec &&
     GitlabCustomHook.new(repo_path, key_id).pre_receive(refs) &&
-    increase_reference_counter(gl_repository)
+    increase_reference_counter(gl_repository, repo_path)
   exit 0
 else
   exit 1