Relax TCP timeouts for koji connections

See COMPOSER-1354 and linked tickets

cmd/osbuild-worker/jobimpl-koji-init.go

@@ -1,9 +1,7 @@
 package main
 
 import (
-	"crypto/tls"
 	"fmt"
-	"net/http"
 	"net/url"
 
 	"github.com/sirupsen/logrus"
@@ -14,17 +12,12 @@ import (
 )
 
 type KojiInitJobImpl struct {
-	KojiServers map[string]koji.GSSAPICredentials
+	KojiServers        map[string]koji.GSSAPICredentials
+	relaxTimeoutFactor uint
 }
 
 func (impl *KojiInitJobImpl) kojiInit(server, name, version, release string) (string, uint64, error) {
-	// Koji for some reason needs TLS renegotiation enabled.
-	// Clone the default http transport and enable renegotiation.
-	transport := http.DefaultTransport.(*http.Transport).Clone()
-	transport.TLSClientConfig = &tls.Config{
-		Renegotiation: tls.RenegotiateOnceAsClient,
-		MinVersion:    tls.VersionTLS12,
-	}
+	transport := koji.CreateKojiTransport(impl.relaxTimeoutFactor)
 
 	serverURL, err := url.Parse(server)
 	if err != nil {