diff --git a/contrib/buildbot/server.py b/contrib/buildbot/server.py
--- a/contrib/buildbot/server.py
+++ b/contrib/buildbot/server.py
@@ -255,6 +255,7 @@
 
         staging_ref = get_mandatory_argument('stagingRef')
         target_phid = get_mandatory_argument('targetPHID')
+        revision_id = get_mandatory_argument('revisionId')
 
         # Get the configuration from master
         config = yaml.safe_load(phab.get_file_content_from_master(
@@ -278,6 +279,9 @@
             properties = [{
                 'name': 'env.ABC_BUILD_NAME',
                 'value': build_name,
+            }, {
+                'name': 'env.ABC_REVISION',
+                'value': revision_id,
             }]
             build_id = tc.trigger_build(
                 'BitcoinABC_BitcoinAbcStaging',
diff --git a/contrib/buildbot/test/test_endpoint_buildDiff.py b/contrib/buildbot/test/test_endpoint_buildDiff.py
--- a/contrib/buildbot/test/test_endpoint_buildDiff.py
+++ b/contrib/buildbot/test/test_endpoint_buildDiff.py
@@ -21,6 +21,7 @@
     def __init__(self):
         self.stagingRef = "refs/tags/phabricator/diff/1234"
         self.targetPHID = "PHID-HMBT-123456"
+        self.revisionId = "D1234"
 
     def __str__(self):
         return "?{}".format("&".join("{}={}".format(key, value)
@@ -70,6 +71,10 @@
                                     'name': 'env.ABC_BUILD_NAME',
                                     'value': build.name,
                                 },
+                                {
+                                    'name': 'env.ABC_REVISION',
+                                    'value': data.revisionId,
+                                },
                                 {
                                     'name': 'env.harborMasterTargetPHID',
                                     'value': data.targetPHID,