diff --git a/newvm.sh b/newvm.sh
index da41865..569881e 100755
--- a/newvm.sh
+++ b/newvm.sh
@@ -75,6 +75,13 @@ while [ $# -gt 0 ]; do
     --domain=*)
         dnsdomain=${1#=*}
         ;;
+    --cfg-branch)
+        shift
+        cfg_branch=$1
+        ;;
+    --cfg-branch=*)
+        cfg_branch=${1#*=}
+        ;;
     --group)
         shift
         groups_xml="${groups_xml}<group name=\"${1}\"/>"
@@ -163,6 +170,10 @@ set -- \
     --boot uefi \
     "$@"
 
+if [ -n "${cfg_branch}" ]; then
+    set -- "$@" --qemu-commandline="-fw_cfg opt/dch/cfg-branch,string=${cfg_branch}"
+fi
+
 if $console; then
     set -- "$@" --autoconsole text
 else