Run mirror-branches as part of update-to-head (#895)

Author: creydr

openshift/release/update-to-head.sh

@@ -21,11 +21,14 @@
 # Synchs the release-next branch to main and then triggers CI
 # Usage: update-to-head.sh
 
-set -e
+set -eo pipefail
 REPO_NAME=$(basename "$(git rev-parse --show-toplevel)")
 
 source openshift/release/common.sh
 
+# Check if there's an upstream release we need to mirror downstream
+openshift/release/mirror-upstream-branches.sh
+
 robot_trigger_msg=":robot: triggering CI on branch 'release-next' after synching from upstream/main"
 
 # Reset release-next to upstream/main.