diff --git a/lib/landing_session.js b/lib/landing_session.js
index 37079c5e..e458d600 100644
--- a/lib/landing_session.js
+++ b/lib/landing_session.js
@@ -84,12 +84,14 @@ class LandingSession extends Session {
     await runAsync('git', [
       'fetch', `https://github.com/${owner}/${repo}.git`,
       `refs/pull/${prid}/merge`]);
-    const [base, head] = (await runAsync('git', [
-      'rev-parse', 'FETCH_HEAD^1', 'FETCH_HEAD^2'], { captureStdout: true }))
-      .split('\n');
-    const commitShas = (await runAsync('git', [
-      'rev-list', `${base}..${head}`], { captureStdout: true }))
-      .trim().split('\n');
+    // We fetched the commit that would result if we used `git merge`.
+    // ^1 and ^2 refer to the PR base and the PR head, respectively.
+    const [base, head] = await runAsync('git',
+      ['rev-parse', 'FETCH_HEAD^1', 'FETCH_HEAD^2'],
+      { captureStdout: 'lines' });
+    const commitShas = await runAsync('git',
+      ['rev-list', `${base}..${head}`],
+      { captureStdout: 'lines' });
     cli.stopSpinner(`Fetched commits as ${shortSha(base)}..${shortSha(head)}`);
     cli.separator();
 
@@ -185,9 +187,9 @@ class LandingSession extends Session {
 
   async tryCompleteLanding(commitInfo) {
     const { cli } = this;
-    const subjects = (await runAsync('git',
+    const subjects = await runAsync('git',
       ['log', '--pretty=format:%s', `${commitInfo.base}..${commitInfo.head}`],
-      { captureStdout: true })).trim().split('\n');
+      { captureStdout: 'lines' });
 
     if (commitInfo.shas.length === 1) {
       const shouldAmend = await cli.prompt(
diff --git a/lib/run.js b/lib/run.js
index 00e068bf..12477907 100644
--- a/lib/run.js
+++ b/lib/run.js
@@ -30,6 +30,10 @@ function runAsyncBase(cmd, args, {
         err.messageOnly = true;
         return reject(err);
       }
+      if (captureStdout === 'lines') {
+        stdout = stdout.split(/\r?\n/g);
+        if (stdout[stdout.length - 1] === '') stdout.pop();
+      }
       return resolve(stdout);
     });
   });