diff --git a/ci-info b/ci-info
index f7fb19b..8b52c9d 100755
--- a/ci-info
+++ b/ci-info
@@ -247,8 +247,8 @@ elif [ -n "$GITHUB_HEAD_REF" ] ; then
   # GitHub Actions pull request (no special handling is required for non-PR GitHub Actions jobs).
   CI_IS_PULL_REQUEST=true
   CI_BRANCH_NAME="${GITHUB_HEAD_REF}"
-  CI_COMMIT_RANGE_START=$(git rev-parse "${GITHUB_BASE_REF}")
-  CI_COMMIT_RANGE_END=$(git rev-parse "${GITHUB_HEAD_REF}")
+  CI_COMMIT_RANGE_START=$(git rev-parse "remotes/origin/${GITHUB_BASE_REF}")
+  CI_COMMIT_RANGE_END=$(git rev-parse "remotes/pull/${GITHUB_REF_NAME}")
   CI_COMMIT_RANGE="${CI_COMMIT_RANGE_START}...${CI_COMMIT_RANGE_END}"
 
 else