/usr/lib/ruby/ is in ruby-git 1.2.8-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/git/
/usr/lib/ruby/vendor_ruby/git/branch.rb
/usr/lib/ruby/vendor_ruby/git/base.rb
/usr/lib/ruby/vendor_ruby/git/working_directory.rb
/usr/lib/ruby/vendor_ruby/git/status.rb
/usr/lib/ruby/vendor_ruby/git/version.rb
/usr/lib/ruby/vendor_ruby/git/stashes.rb
/usr/lib/ruby/vendor_ruby/git/branches.rb
/usr/lib/ruby/vendor_ruby/git/author.rb
/usr/lib/ruby/vendor_ruby/git/log.rb
/usr/lib/ruby/vendor_ruby/git/remote.rb
/usr/lib/ruby/vendor_ruby/git/diff.rb
/usr/lib/ruby/vendor_ruby/git/repository.rb
/usr/lib/ruby/vendor_ruby/git/lib.rb
/usr/lib/ruby/vendor_ruby/git/index.rb
/usr/lib/ruby/vendor_ruby/git/stash.rb
/usr/lib/ruby/vendor_ruby/git/path.rb
/usr/lib/ruby/vendor_ruby/git/object.rb
/usr/lib/ruby/vendor_ruby/git.rb