Wait until project imports before proceeding

We wait so that the project repository is created before we
try to use it.

qa/qa/resource/project.rb

@@ -105,7 +105,16 @@ module QA
       def fabricate_via_api!
         resource_web_url(api_get)
       rescue ResourceNotFoundError
-        super
+        response = super
+
+        # If a project is being imported, wait until it completes before we let the test continue.
+        # Otherwise we see Git repository errors
+        # See https://gitlab.com/gitlab-org/gitlab/-/issues/356101
+        Support::Retrier.retry_until(max_duration: 60, sleep_interval: 5) do
+          %w[none finished].include?(reload!.api_resource[:import_status])
+        end
+
+        response
       end
 
       def api_get_path

qa/qa/specs/features/api/3_create/repository/commit_to_templated_project_spec.rb

+# frozen_string_literal: true
+
+module QA
+  RSpec.describe 'Create' do
+    describe 'Create a new project from a template' do
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'templated-project'
+          project.template_name = 'dotnetcore'
+        end
+      end
+
+      it 'commits via the api' do
+        expect do
+          Resource::Repository::Commit.fabricate_via_api! do |commit|
+            commit.project = project
+            commit.update_files(
+              [
+                  {
+                      file_path: '.gitlab-ci.yml',
+                      content: 'script'
+                  }
+              ]
+            )
+            commit.add_files(
+              [
+                  {
+                      file_path: 'foo',
+                      content: 'bar'
+                  }
+              ]
+            )
+          end
+        end.not_to raise_exception
+      end
+    end
+  end
+end