dmaketgz: use --no-cache when building docker image

Fixes #15689
Closes #15690

.mailmap

@@ -112,3 +112,4 @@ Christian Weisgerber <naddy@mips.inka.de> <curl-library@lists.haxx.se>
 Moritz Buhl <git@moritzbuhl.de>
 Aki Sakurai <75532970+AkiSakurai@users.noreply.github.com>
 Sinkevich Artem <artsin666@gmail.com>
+Andrew Kirillov <akirillo@uk.ibm.com>

scripts/dmaketgz

@@ -40,6 +40,7 @@ if test -f Makefile; then
     make distclean
 fi
 docker build \
+       --no-cache \
        --build-arg SOURCE_DATE_EPOCH="$timestamp" \
        --build-arg UID="$(id -u)" \
        --build-arg GID="$(id -g)" \