diff --git a/jenkins_jobs/modules/scm.py b/jenkins_jobs/modules/scm.py
index 87429f8d9..6c68dc158 100644
--- a/jenkins_jobs/modules/scm.py
+++ b/jenkins_jobs/modules/scm.py
@@ -447,6 +447,7 @@ def git_extensions(xml_parent, data):
         "timeout",
         "do-not-fetch-tags",
         "honor-refspec",
+        "reference-repo",
     )
     if any(key in data for key in clone_options):
         ext_name = impl_prefix + 'CloneOption'
@@ -471,6 +472,8 @@ def git_extensions(xml_parent, data):
         if 'honor-refspec' in data:
             XML.SubElement(ext, 'honorRefspec').text = str(
                 data.get('honor-refspec', False)).lower()
+        if 'reference-repo' in data:
+            XML.SubElement(ext, 'reference').text = str(data['reference-repo'])
     if not trait and 'sparse-checkout' in data:
         ext_name = impl_prefix + 'SparseCheckoutPaths'
         ext = XML.SubElement(xml_parent, ext_name)
diff --git a/tests/scm/fixtures/git-extensions-reference-repo.xml b/tests/scm/fixtures/git-extensions-reference-repo.xml
new file mode 100644
index 000000000..25e724dd3
--- /dev/null
+++ b/tests/scm/fixtures/git-extensions-reference-repo.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <scm class="hudson.plugins.git.GitSCM">
+    <configVersion>2</configVersion>
+    <userRemoteConfigs>
+      <hudson.plugins.git.UserRemoteConfig>
+        <name>origin</name>
+        <refspec>+refs/heads/*:refs/remotes/origin/*</refspec>
+        <url>https://example.com/project.git</url>
+      </hudson.plugins.git.UserRemoteConfig>
+    </userRemoteConfigs>
+    <branches>
+      <hudson.plugins.git.BranchSpec>
+        <name>**</name>
+      </hudson.plugins.git.BranchSpec>
+    </branches>
+    <disableSubmodules>false</disableSubmodules>
+    <recursiveSubmodules>false</recursiveSubmodules>
+    <doGenerateSubmoduleConfigurations>false</doGenerateSubmoduleConfigurations>
+    <remotePoll>false</remotePoll>
+    <gitTool>Default</gitTool>
+    <submoduleCfg class="list"/>
+    <reference>/path/to/reference/repo.git</reference>
+    <gitConfigName/>
+    <gitConfigEmail/>
+    <extensions>
+      <hudson.plugins.git.extensions.impl.CloneOption>
+        <shallow>false</shallow>
+        <depth>1</depth>
+        <reference>/path/to/reference/repo.git</reference>
+      </hudson.plugins.git.extensions.impl.CloneOption>
+      <hudson.plugins.git.extensions.impl.WipeWorkspace/>
+    </extensions>
+  </scm>
+</project>
diff --git a/tests/scm/fixtures/git-extensions-reference-repo.yaml b/tests/scm/fixtures/git-extensions-reference-repo.yaml
new file mode 100644
index 000000000..24461d819
--- /dev/null
+++ b/tests/scm/fixtures/git-extensions-reference-repo.yaml
@@ -0,0 +1,4 @@
+scm:
+  - git:
+      url: https://example.com/project.git
+      reference-repo: /path/to/reference/repo.git