diff --git a/playbooks/roles/sync-project-config/README.rst b/playbooks/roles/sync-project-config/README.rst
index f30e2ad8cd..39752d794f 100644
--- a/playbooks/roles/sync-project-config/README.rst
+++ b/playbooks/roles/sync-project-config/README.rst
@@ -1 +1,14 @@
 Sync project-config to remote host
+
+This syncs the ``project-config`` repo checked out on the bastion host
+(which is actually running the Ansible that runs this role) to the
+current host.  This repo holds configuration for some production hosts
+and thus we want to make sure to deploy those services with the
+checked-out tree Zuul has prepared for a given deploy-pipeline CD job
+run (i.e. so we apply config updates in commit order).
+
+Also see the `setup-src
+<https://opendev.org/opendev/base-jobs/src/branch/master/playbooks/infra-prod/setup-src.yaml>`__
+to see where this checkout is setup; there are some tricks -- for
+example for hourly and periodic jobs we want to ensure we run from
+master at the time the job runs, not at the time the job was enqueued.
diff --git a/playbooks/roles/sync-project-config/defaults/main.yaml b/playbooks/roles/sync-project-config/defaults/main.yaml
index e17024ad67..1dad7599f7 100644
--- a/playbooks/roles/sync-project-config/defaults/main.yaml
+++ b/playbooks/roles/sync-project-config/defaults/main.yaml
@@ -1,3 +1,2 @@
 project_config_dest: /opt/project-config
 project_config_subdir: ""
-infra_prod_run_from_master: "{{ zuul.pipeline|default('') in ['periodic', 'opendev-prod-hourly'] }}"
diff --git a/playbooks/roles/sync-project-config/tasks/main.yaml b/playbooks/roles/sync-project-config/tasks/main.yaml
index e9119969c2..8c54d4989e 100644
--- a/playbooks/roles/sync-project-config/tasks/main.yaml
+++ b/playbooks/roles/sync-project-config/tasks/main.yaml
@@ -3,14 +3,6 @@
     path: '{{ project_config_dest }}'
     state: directory
 
-- name: Update from master on bastion host
-  when: infra_prod_run_from_master|bool
-  delegate_to: '{{ groups["bastion"][0] }}'
-  git:
-    repo: https://opendev.org/openstack/project-config
-    dest: '{{ project_config_src }}'
-    force: yes
-
 - name: Sync project-config repo
   synchronize:
     src: '{{ project_config_src }}/{{ project_config_subdir }}'