diff --git a/.ci/Jenkinsfile b/.ci/Jenkinsfile
index 6910e5c33..03738c943 100644
--- a/.ci/Jenkinsfile
+++ b/.ci/Jenkinsfile
@@ -121,6 +121,18 @@ pipeline {
         }
       }
     }
+    stage('Downstream - Package') {
+      options { skipDefaultCheckout() }
+      when {
+        not { changeRequest() }
+      }
+      steps {
+        build(job: "Ingest-manager/fleet-server-package-mbp/${env.JOB_BASE_NAME}",
+              propagate: false,
+              wait: false,
+              parameters: [string(name: 'COMMIT', value: "${env.GIT_BASE_COMMIT}")])
+      }
+    }
   }
   post {
     cleanup {
diff --git a/.ci/packaging.groovy b/.ci/packaging.groovy
index d14ccba19..4e8d6760f 100644
--- a/.ci/packaging.groovy
+++ b/.ci/packaging.groovy
@@ -13,6 +13,8 @@ pipeline {
     DOCKER_SECRET = 'secret/observability-team/ci/docker-registry/prod'
     DOCKER_REGISTRY = 'docker.elastic.co'
     DRA_OUTPUT = 'release-manager.out'
+    COMMIT = "${params?.COMMIT}"
+    JOB_GIT_CREDENTIALS = "f6c7695a-671e-4f4f-a331-acdce44ff9ba"
   }
   options {
     timeout(time: 2, unit: 'HOURS')
@@ -24,9 +26,8 @@ pipeline {
     rateLimitBuilds(throttle: [count: 60, durationName: 'hour', userBoost: true])
     quietPeriod(10)
   }
-  triggers {
-    // disable upstream trigger on a PR basis
-    upstream("Ingest-manager/fleet-server/${ env.JOB_BASE_NAME.startsWith('PR-') ? 'none' : env.JOB_BASE_NAME }")
+  parameters {
+    string(name: 'COMMIT', defaultValue: '', description: 'The Git commit to be used (empty will checkout the latest commit)')
   }
   stages {
     stage('Filter build') {
@@ -58,9 +59,8 @@ pipeline {
           steps {
             pipelineManager([ cancelPreviousRunningBuilds: [ when: 'PR' ] ])
             deleteDir()
-            gitCheckout(basedir: "${BASE_DIR}", githubNotifyFirstTimeContributor: false,
-                        shallow: false, reference: "/var/lib/jenkins/.git-references/${REPO}.git")
-            stash allowEmpty: true, name: 'source', useDefaultExcludes: false
+            smartGitCheckout()
+            stash(allowEmpty: true, name: 'source', useDefaultExcludes: false)
             setEnvVar('IS_BRANCH_AVAILABLE', isBranchUnifiedReleaseAvailable(env.BRANCH_NAME))
             dir("${BASE_DIR}") {
               setEnvVar('VERSION', sh(label: 'Get version', script: 'make get-version', returnStdout: true)?.trim())
@@ -113,7 +113,6 @@ pipeline {
             }
           }
         }
-
         stage('DRA Snapshot') {
           options { skipDefaultCheckout() }
           // The Unified Release process keeps moving branches as soon as a new
@@ -250,3 +249,18 @@ def runIfNoMainAndNoStaging(Closure body) {
     body()
   }
 }
+
+def smartGitCheckout() {
+  // Checkout the given commit
+  if (env.COMMIT?.trim()) {
+    gitCheckout(basedir: "${BASE_DIR}",
+                branch: "${env.COMMIT}",
+                credentialsId: "${JOB_GIT_CREDENTIALS}",
+                repo: "https://github.com/elastic/${REPO}.git")
+  } else {
+    gitCheckout(basedir: "${BASE_DIR}",
+                githubNotifyFirstTimeContributor: false,
+                shallow: false,
+                reference: "/var/lib/jenkins/.git-references/${REPO}.git")
+  }
+}