diff --git a/get-modified-packages/get-modified-packages.sh b/get-modified-packages/get-modified-packages.sh
index f0d8d266..4d627055 100755
--- a/get-modified-packages/get-modified-packages.sh
+++ b/get-modified-packages/get-modified-packages.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
-# Search for packages that have been modified from the base ref.
-# Usage: get-modified-packages.sh <base_ref>
+# Search for packages that have been modified from the base branch.
+# Usage: get-modified-packages.sh <base_branch>
 
 set -e
 
@@ -15,11 +15,12 @@ while [ "${1-}" != "" ]; do
     shift
 done
 
-base_ref="${args[0]}"
+# example: base_branch="origin/main"
+base_branch="${args[0]}"
 
 # Check args
-if [ "$base_ref" = "" ]; then
-    echo -e "\e[31mPlease input a valid base_ref as the 1st argument.\e[m"
+if [ "$base_branch" = "" ]; then
+    echo -e "\e[31mPlease input a valid base_branch as the 1st argument.\e[m"
     exit 1
 fi
 
@@ -49,8 +50,8 @@ function find_package_dir() {
     return 1
 }
 
-# Find modified files from base ref
-modified_files=$(git diff --name-only "$base_ref"...HEAD)
+# Find modified files from base branch
+modified_files=$(git diff --name-only "$base_branch"...HEAD)
 
 # Find modified packages
 modified_package_dirs=()