LFS download service not skipping body fragment on redirect

Summary

When mirroring an external repository using object storage (Gitlab + S3), I get a 'size mismatch' error.

This is due to the body of the redirection not being skipped in this code: https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/services/projects/lfs_pointers/lfs_download_service.rb#L63

Possible fixes

Replace this code:

      def download_and_save_file!(file)
        digester = Digest::SHA256.new
        fetch_file do |fragment|
          digester << fragment
          file.write(fragment)

          raise_size_error! if file.size > lfs_size
        end

with

      def download_and_save_file!(file)
        digester = Digest::SHA256.new
        fetch_file do |fragment|
          if ! [301, 302].include?(fragment.code)
            digester << fragment
            file.write(fragment) 
          end
          raise_size_error! if file.size > lfs_size         
        end