use a git release on the other repo

docker/hooks/post_push

@@ -1,4 +1,7 @@
 #!/bin/bash
 for url in $(echo $BUILD_TRIGGERS | sed "s/,/ /g"); do
-  curl -sL -X POST -H "Content-Type: application/json" --data "{ \"build\": true, \"source_name\": \"$SOURCE_BRANCH\" }" $url
+  curl -sL -X POST -H "Content-Type: application/json" \
+    -u "$ACCESS_TOKEN" \
+    --data "{\"tag_name\": \"$SOURCE_BRANCH\", \"target_commitish\": \"master\", \"name\": \"Netdisco $SOURCE_BRANCH\"}" \
+    $url
 done