diff --git a/app/controllers/projects/pull_requests_controller.rb b/app/controllers/projects/pull_requests_controller.rb
index c961ead4d..08dabf8e2 100644
--- a/app/controllers/projects/pull_requests_controller.rb
+++ b/app/controllers/projects/pull_requests_controller.rb
@@ -152,7 +152,7 @@ class Projects::PullRequestsController < Projects::BaseController
       @pull.issue.body = pull_params[:issue_attributes][:body].presence
     end
     @pull.from_project = @project
-    @pull.to_ref = (pull_params[:to_ref].presence if pull_params) || @pull.to_project.default_head(params[:treeish])
+    @pull.to_ref = (pull_params[:to_ref].presence if pull_params) || @pull.to_project.default_head
     @pull.from_ref = params[:treeish].presence || (pull_params[:from_ref].presence if pull_params) || @pull.from_project.default_head(params[:treeish])
     @pull.from_project_owner_uname = @pull.from_project.owner.uname
     @pull.from_project_name = @pull.from_project.name
diff --git a/app/models/pull_request.rb b/app/models/pull_request.rb
index ae549e93e..7f3478620 100644
--- a/app/models/pull_request.rb
+++ b/app/models/pull_request.rb
@@ -177,7 +177,9 @@ class PullRequest < ActiveRecord::Base
 
     Dir.chdir(path) do
       system 'git', 'tag', '-d', from_ref, to_ref
-      system 'git fetch --tags'
+      system 'git fetch --tags -all'
+      system 'git fetch --all'
+
       tags, head = repo.tags.map(&:name), to_project == from_project ? 'origin' : 'head'
       system 'git', 'checkout', to_ref
       unless tags.include? to_ref