fix getting git tag

podman_push.sh

@@ -3,7 +3,7 @@ script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 repo="$(basename "${script_dir}")"
 tag="${1}"
 if [ -z "${tag}" ]; then
-    git_reference=$(grep '^ref: ' .git/HEAD | awk 'BEGIN {FS="/"} {print($NF)}')
+    git_reference=$(git describe --exact-match --tags)
     if [ "${git_reference}" == 'master' ] || [ "${git_reference}" == 'main' ] || [ -z "${git_reference}" ]; then
         echo "Change to a different git reference not 'master/main', since it will be used as tag for the container. Or pass a tag name as only parameter."
         exit 1