diff --git a/src/main/scala/app/PullRequestsController.scala b/src/main/scala/app/PullRequestsController.scala
index ea8afd5..8c888c9 100644
--- a/src/main/scala/app/PullRequestsController.scala
+++ b/src/main/scala/app/PullRequestsController.scala
@@ -18,6 +18,7 @@
 import org.slf4j.LoggerFactory
 import org.eclipse.jgit.merge.MergeStrategy
 import org.eclipse.jgit.errors.NoMergeBaseException
+import org.eclipse.jgit.api.errors.TransportException
 
 class PullRequestsController extends PullRequestsControllerBase
   with RepositoryService with AccountService with IssuesService with PullRequestService with MilestonesService with ActivityService
@@ -450,12 +451,16 @@
    * Fetch pull request contents into refs/pull/${issueId}/head and return the head commit id of the pull request.
    */
   private def fetchPullRequest(git: Git, issueId: Int, requestUserName: String, requestRepositoryName: String, requestBranch: String): String = {
-    git.fetch
-      .setRemote(getRepositoryDir(requestUserName, requestRepositoryName).toURI.toString)
-      .setRefSpecs(new RefSpec(s"refs/heads/${requestBranch}:refs/pull/${issueId}/head").setForceUpdate(true))
-      .call
-
+    try {
+      git.fetch
+        .setRemote(getRepositoryDir(requestUserName, requestRepositoryName).toURI.toString)
+        .setRefSpecs(new RefSpec(s"refs/heads/${requestBranch}:refs/pull/${issueId}/head").setForceUpdate(true))
+        .call
+    } catch {
+      case ex: TransportException => // ignore
+    }
     git.getRepository.resolve(s"refs/pull/${issueId}/head").getName
   }
 
+
 }