eclipse-temurin: add GitFetch: refs/heads/main

library/eclipse-temurin

@@ -2,6 +2,7 @@
 
 Maintainers: George Adams <[email protected]> (@gdams)
 GitRepo: https://github.com/adoptium/containers.git
+GitFetch: refs/heads/main
 
 #------------------------------v8 images---------------------------------
 Tags: 8u302-b08-jdk-focal, 8-jdk-focal, 8-focal