diff --git a/lib/config/utils.js b/lib/config/utils.js
index 39be6c2ae..c42bbd89f 100644
--- a/lib/config/utils.js
+++ b/lib/config/utils.js
@@ -27,7 +27,7 @@ exports.toIntegerConfig = function toIntegerConfig (configValue) {
 exports.getGitCommit = function getGitCommit (repodir) {
   try {
     // prefer using git to get the current ref, as poking in .git is very fragile
-    return require('child_process').execSync('git rev-parse HEAD')
+    return require('child_process').execSync('git rev-parse HEAD').replace('\n', '')
   } catch (e) {
     // there was an error running git, try to parse refs ourselves
     if (!fs.existsSync(repodir + '/.git/HEAD')) {