diff --git a/.githooks/post-checkout b/.githooks/post-checkout
index 4ab23fa..5656928 100755
--- a/.githooks/post-checkout
+++ b/.githooks/post-checkout
@@ -3,8 +3,15 @@ echo "PREV-HEAD=$1"
 echo "CURR-HEAD=$2"
 echo "BRANCH-CHECKOUT=$3"
 
-if [ -f /opt/app/tools/atbupdate/checkout_history ]; then
-    readonly repo=i$(basename $(git rev-parse --show-toplevel))   
+readonly ch_file="/opt/app/tools/atbupdate/checkout_history"
+readonly update_log_file="/opt/app/tools/atbupdate/update_log.csv"
+
+if [ -f $ch_file ]; then
+    readonly repo=$(basename $(git rev-parse --show-toplevel))   
     readonly branch=$(git log --graph --all --decorate $2 | head -n 1 | sed -E -e 's/(.*?)(\(.*\))/\2/g')
-    echo "$repo:$branch"
+    line="$repo:$branch"
+    if ! grep -Eq $line $ch_file; then
+        echo $line >> $ch_file
+        echo "DOWNLOAD, /etc/dc/dc2c.4.21.bin, $(date +%Y-%m-%dT%T, N/A)" >> $update_log_file
+    fi
 fi