Get packer image repo HEAD hash

.gitlab-ci.yml

@@ -48,6 +48,7 @@ build_image:
     - export CRI_XCBC_prod=$(git rev-parse --short origin/uab-prod)
     - cd ..
     - echo CRI_XCBC_HEAD=${CRI_XCBC_HEAD} | tee -a $CI_PROJECT_DIR/image.env
+    - export PACKER_IMAGE_HEAD=$(git rev-parse --short HEAD)
     - export BUILD_DATE=$(TZ=America/Chicago date +%Y%m%d)
     - echo BUILD_DATE=${BUILD_DATE} | tee -a $CI_PROJECT_DIR/image.env
     - >