diff --git a/diff-sha.sh b/diff-sha.sh
index 434f2899..13ff18fe 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -57,6 +57,7 @@ else
 fi
 
 if [[ -z $GITHUB_BASE_REF ]]; then
+  echo "Running on a push event..."
   TARGET_BRANCH=${GITHUB_REF/refs\/heads\//} && exit_status=$? || exit_status=$?
   CURRENT_BRANCH=$TARGET_BRANCH && exit_status=$? || exit_status=$?
 
@@ -64,6 +65,7 @@ if [[ -z $GITHUB_BASE_REF ]]; then
     PREVIOUS_SHA=$GITHUB_EVENT_BEFORE
 
     if [[ -z "$PREVIOUS_SHA" || "$PREVIOUS_SHA" == "0000000000000000000000000000000000000000" ]]; then
+      echo "::debug::First commit detected"
       PREVIOUS_SHA=$(git rev-parse "$(git branch -r --sort=-committerdate | head -1)")
     fi
 
@@ -89,6 +91,7 @@ if [[ -z $GITHUB_BASE_REF ]]; then
     exit 1
   fi
 else
+  echo "Running on a pull request event..."
   TARGET_BRANCH=$GITHUB_BASE_REF
   CURRENT_BRANCH=$GITHUB_HEAD_REF
 
diff --git a/get-base-sha.sh b/get-base-sha.sh
index c2fcee3c..93bae610 100644
--- a/get-base-sha.sh
+++ b/get-base-sha.sh
@@ -25,6 +25,7 @@ elif [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "true" ]]; then
   LAST_REMOTE_COMMIT="$GITHUB_EVENT_BEFORE"
 
   if [[ -z "$LAST_REMOTE_COMMIT" || "$LAST_REMOTE_COMMIT" == "0000000000000000000000000000000000000000" ]]; then
+    echo "::debug::First commit detected"
     LAST_REMOTE_COMMIT=$(git rev-parse "$(git branch -r --sort=-committerdate | head -1)")
   fi
   if [[ "$INPUT_SHA" == "$LAST_REMOTE_COMMIT" ]]; then