Use Gitlab::Git helper methods and constants as much as possible.

app/controllers/projects/tags_controller.rb

app/mailers/emails/projects.rb

app/models/event.rb

app/models/project_services/asana_service.rb

app/models/project_services/campfire_service.rb

app/models/project_services/hipchat_service.rb

app/models/project_services/pushover_service.rb

app/models/project_services/slack_service/push_message.rb

app/models/project_services/teamcity_service.rb

app/services/create_tag_service.rb

app/services/event_create_service.rb

app/services/git_push_service.rb

app/services/merge_requests/refresh_service.rb

app/workers/emails_on_push_worker.rb

app/workers/irker_worker.rb

app/workers/post_receive.rb

lib/gitlab/git.rb

lib/gitlab/git_access.rb

lib/gitlab/push_data_builder.rb

spec/models/project_services/hipchat_service_spec.rb