diff --git a/jenkins/SO/start_build b/jenkins/SO/start_build
index 8094a39..a672e14 100755
--- a/jenkins/SO/start_build
+++ b/jenkins/SO/start_build
@@ -25,32 +25,9 @@
 # SET YOU MDG repository name here
 export OSM_MDG=SO
 OSM_load_config
+OSM_git_checkout "$@"
 
-
-# Here is an example for how to handle an incremental build
-if [ -d $OSM_MDG ]; then
-    INFO "reusing existing workspace"
-    cd $OSM_MDG
-    git pull 
-else
-    INFO "cloning MDG $OSM_MDG from $OSM_GIT_URL/$OSM_MDG"
-    git clone $OSM_GIT_URL/$OSM_MDG
-    cd $OSM_MDG
-fi
-
-if [ $# -gt 0 ]; then
-    if [ "$1" = "checkout" ]; then
-        INFO "Code to compile: '$2'"
-        git checkout $2
-    else
-        INFO "Code to compile: gerrit refspec '$1', commit-id: '$2'"
-        git fetch origin $1 || FATAL "git fetch origin '$1' didn't work"
-        git checkout -f $2 || FATAL "git checkout -f '$2' didn't work"
-    fi
-else
-    INFO "Code to compile: master"
-    git checkout master
-fi
+trap 'WARNING "INTERRUPT"; exit 1' INT
 
 INFO "starting build"
 make clean || FATAL "make clean failed"