Gem::RemoteFetcher#fetch_s3

# File tmp/rubies/ruby-4.0.0/lib/rubygems/remote_fetcher.rb, line 272
def fetch_s3(uri, mtime = nil, head = false)
  begin
    public_uri = s3_uri_signer(uri, head ? "HEAD" : "GET").sign
  rescue Gem::S3URISigner::ConfigurationError, Gem::S3URISigner::InstanceProfileError => e
    raise FetchError.new(e.message, "s3://#{uri.host}")
  end
  fetch_https public_uri, mtime, head
end