diff --git a/lib/api.js b/lib/api.js
index b45e864b..c0f13975 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -85,8 +85,14 @@ async function handlePullRequestUpdate(context, eventName, event) {
     return;
   }
 
-  await update(context, event.pull_request);
-  await merge(context, event.pull_request);
+  const pullRequest = await fetchPullRequest(
+    context,
+    event.pull_request.base.repo,
+    event.pull_request
+  );
+
+  await update(context, pullRequest);
+  await merge(context, pullRequest);
 }
 
 async function handleCheckUpdate(context, eventName, event) {
@@ -126,8 +132,13 @@ async function handlePullRequestReviewUpdate(context, eventName, event) {
   const { action, review } = event;
   if (action === "submitted") {
     if (review.state === "approved") {
-      await update(context, event.pull_request);
-      await merge(context, event.pull_request);
+      const pullRequest = await fetchPullRequest(
+        context,
+        event.pull_request.base.repo,
+        event.pull_request
+      );
+      await update(context, pullRequest);
+      await merge(context, pullRequest);
     } else {
       logger.info("Review state is not approved:", review.state);
       logger.info("Action ignored:", eventName, action);
@@ -280,17 +291,7 @@ async function handleIssueComment(context, eventName, event) {
     if (issue.pull_request == null) {
       logger.info("Comment not on a PR, skipping");
     } else {
-      const { octokit } = context;
-
-      logger.debug("Getting pull request info for", issue.number, "...");
-      let { data: pullRequest } = await octokit.pulls.get({
-        owner: repository.owner.login,
-        repo: repository.name,
-        pull_number: issue.number
-      });
-
-      logger.trace("Full PR:", pullRequest);
-
+      const pullRequest = await fetchPullRequest(context, repository, issue);
       await update(context, pullRequest);
       await merge(context, pullRequest);
     }
@@ -299,4 +300,19 @@ async function handleIssueComment(context, eventName, event) {
   }
 }
 
+async function fetchPullRequest(context, repository, issue) {
+  const { octokit } = context;
+  const { number } = issue;
+
+  logger.debug("Getting pull request info for", number, "...");
+  let { data: pullRequest } = await octokit.pulls.get({
+    owner: repository.owner.login,
+    repo: repository.name,
+    pull_number: number
+  });
+
+  logger.trace("Full PR:", pullRequest);
+  return pullRequest;
+}
+
 module.exports = { executeLocally, executeGitHubAction };