-test -d letsencrypt || git clone --quiet https://github.com/saltstack-formulas/letsencrypt-formula.git ${F_DIR}/letsencrypt
-( cd letsencrypt && git checkout --quiet tags/"${LETSENCRYPT_TAG}" -b "${LETSENCRYPT_TAG}" )
+test -d letsencrypt && ( cd letsencrypt && git fetch ) \
+ || git clone --quiet https://github.com/saltstack-formulas/letsencrypt-formula.git ${F_DIR}/letsencrypt
+( cd letsencrypt && git checkout --quiet tags/"${LETSENCRYPT_TAG}" )