diff --git a/jobs/templates/swh-docs-pipeline-diff.groovy.j2 b/jobs/templates/swh-docs-pipeline-diff.groovy.j2
index 711fc5d..b56de42 100644
--- a/jobs/templates/swh-docs-pipeline-diff.groovy.j2
+++ b/jobs/templates/swh-docs-pipeline-diff.groovy.j2
@@ -1,116 +1,116 @@
 pipeline {
   {% filter indent(width=2) %}
     {%- include 'templates/includes/agent-docker.groovy.j2' -%}
   {% endfilter %}
 
   environment {
     PHAB_CONDUIT_URL = 'https://forge.softwareheritage.org/api/'
   }
 
   stages {
     stage('Checkout swh environment') {
       steps {
         {% filter indent(width=8) %}
           {%- include 'templates/includes/create-phabricator-artifacts.groovy.j2' -%}
         {% endfilter %}
         checkout([
           $class: 'GitSCM',
           doGenerateSubmoduleConfigurations: false,
           extensions: [[$class: 'CloneOption', depth: 1, shallow: true]],
           gitTool: 'Default',
           submoduleCfg: [],
           userRemoteConfigs: [
             [url: 'https://forge.softwareheritage.org/source/swh-environment.git'],
           ],
         ])
       }
     }
 
     stage('Checkout swh modules') {
       steps {
         script {
           sh'''#!/bin/bash
           crudini --del .mrconfig snippets
           crudini --del .mrconfig swh-py-template
-          # force shallow clone of swh-repos except swh-docs
-          sed -i '/swh-docs/!s/git clone/git clone --depth 1/g' .mrconfig
+          # only fetch the HEAD branch instead of all (potentially large) branches
+          sed -i '/swh-docs/!s/git clone/git clone --single-branch/g' .mrconfig
           mr -j 4 -t update
           '''
         }
       }
     }
 
     stage('Apply phabricator diff') {
       steps {
         dir('swh-docs') {
           {% filter indent(width=10) %}
             {%- include 'templates/includes/script-apply-phabricator-diff.groovy.j2' -%}
           {% endfilter %}
         }
       }
     }
 
     stage('Build Software Heritage documentation') {
       steps {
         dir('swh-docs') {
           script {
             sh '''#!/bin/bash
             SPHINXOPTS='-W -q --keep-going -w errors.log' SPHINXOPTCOLOR='--no-color' tox -e sphinx-dev
             '''
           }
         }
       }
     }
   }
 
   post {
     always {
       step([$class: 'PhabricatorNotifier',
             commentOnSuccess: true,
             commentWithConsoleLinkOnFailure: true,
             commentFile: 'swh-docs/.phabricator-comment',
             commentSize: '1000000',
             preserveFormatting: true,
             processLint: true,
             lintFile: '.phabricator-lint',
             lintFileSize: '1000000',
       ])
 
       archiveArtifacts(
         allowEmptyArchive: true,
         artifacts: 'swh-docs/docs/errors.log,swh-docs/.tox/log/*',
         fingerprint: true,
       )
 
       publishHTML (target: [
         allowMissing: true,
         alwaysLinkToLastBuild: false,
         keepAll: true,
         reportDir: 'swh-docs/docs/_build/html',
         reportFiles: 'index.html',
         reportName: 'SWH Documentation'
       ])
 
       publishHTML (target: [
         allowMissing: true,
         alwaysLinkToLastBuild: false,
         keepAll: true,
         reportDir: 'swh-docs/user/_build/html',
         reportFiles: 'index.html',
         reportName: 'SWH User Documentation'
       ])
 
       publishHTML (target: [
         allowMissing: true,
         alwaysLinkToLastBuild: false,
         keepAll: true,
         reportDir: 'swh-docs/sysadm/_build/html',
         reportFiles: 'index.html',
         reportName: 'SWH sysadmin Documentation'
       ])
     }
     cleanup {
       cleanWs()
     }
   }
-}
\ No newline at end of file
+}