diff --git a/runbot/models/branch.py b/runbot/models/branch.py
index e3ce456a..52f0e488 100644
--- a/runbot/models/branch.py
+++ b/runbot/models/branch.py
@@ -6,7 +6,7 @@ from odoo import models, fields, api
 
 _logger = logging.getLogger(__name__)
 _re_coverage = re.compile(r'\bcoverage\b')
-
+_re_patch = re.compile(r'.*patch-\d+$')
 
 class runbot_branch(models.Model):
 
@@ -72,8 +72,9 @@ class runbot_branch(models.Model):
         """compute pull head name"""
         for branch in self:
             pi = self._get_pull_info()
-            if pi:
-                branch.pull_head_name = pi['head']['ref']
+            if pi and not _re_patch.match(pi['head']['label']):
+                # label is used to disambiguate PR with same branch name
+                branch.pull_head_name = pi['head']['label']
 
     def _get_branch_quickconnect_url(self, fqdn, dest):
         self.ensure_one()
diff --git a/runbot/models/build.py b/runbot/models/build.py
index c1687495..24c02999 100644
--- a/runbot/models/build.py
+++ b/runbot/models/build.py
@@ -133,8 +133,7 @@ class runbot_build(models.Model):
 
         build = self
         branch, repo = build.branch_id, build.repo_id
-        pi = branch._get_pull_info()
-        name = pi['base']['ref'] if pi else branch.branch_name
+        name = branch.pull_head_name or branch.branch_name
 
         target_repo = self.env['runbot.repo'].browse(target_repo_id)