Revert removal of git-mirror jobs for pipelines

Fixes: PROD-27024 (PROD:27024)
Related: PROD-27010 (PROD:27010)
Related: PROD-27028 (PROD:27028)

Change-Id: I473b3dadc31c61c028c19cd3921619bb38f3c1e7
diff --git a/jenkins/client/job/git-mirrors/downstream/init.yml b/jenkins/client/job/git-mirrors/downstream/init.yml
index 2500254..8803f18 100644
--- a/jenkins/client/job/git-mirrors/downstream/init.yml
+++ b/jenkins/client/job/git-mirrors/downstream/init.yml
@@ -1,2 +1,41 @@
-# This file will be removed in Q3
-# jobs was moved into salt-models/infra repo
+parameters:
+  _param:
+    jenkins_git_mirror_downstream_jobs: []
+    jenkins_pollscm_spec: "H/60 * * * *"
+  jenkins:
+    client:
+      job_template:
+        git_mirror_downstream_common:
+          name: git-mirror-downstream-{{name}}
+          jobs: ${_param:jenkins_git_mirror_downstream_jobs}
+          template:
+            discard:
+              build:
+                keep_num: 10
+              artifact:
+                keep_num: 10
+            type: workflow-scm
+            concurrent: false
+            scm:
+              type: git
+              url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+              branch: "${_param:jenkins_pipelines_branch}"
+              credentials: "gerrit"
+              script: git-mirror-pipeline.groovy
+            trigger:
+              pollscm:
+                spec: ${_param:jenkins_pollscm_spec}
+            param:
+              SOURCE_URL:
+                type: string
+                default: "{{upstream}}"
+              TARGET_URL:
+                type: string
+                default: "${_param:jenkins_gerrit_url}/{{downstream}}"
+              CREDENTIALS_ID:
+                type: string
+                default: "gerrit"
+              BRANCHES:
+                type: string
+                default: "{{branches}}"
+                description: "Comma-separated list of branches to mirror"
\ No newline at end of file