diff --git a/ofborg/src/checkout.rs b/ofborg/src/checkout.rs
index 3d7c372..a3d4c62 100644
--- a/ofborg/src/checkout.rs
+++ b/ofborg/src/checkout.rs
@@ -5,6 +5,7 @@ use std::io::{Error,ErrorKind};
 use ofborg::clone;
 use ofborg::clone::GitClonable;
 use std::ffi::OsStr;
+use std::ffi::OsString;
 use std::process::Command;
 
 pub struct CachedCloner {
@@ -73,6 +74,13 @@ impl CachedProject {
 }
 
 impl CachedProjectCo {
+    pub fn checkout_origin_ref(&self, git_ref: &OsStr) -> Result<String, Error> {
+        let mut pref = OsString::from("origin/");
+        pref.push(git_ref);
+
+        self.checkout_ref(&pref)
+    }
+
     pub fn checkout_ref(&self, git_ref: &OsStr) -> Result<String, Error> {
         fs::create_dir_all(&self.root)?;
 
diff --git a/ofborg/src/clone.rs b/ofborg/src/clone.rs
index 59525cc..91aa205 100644
--- a/ofborg/src/clone.rs
+++ b/ofborg/src/clone.rs
@@ -132,6 +132,7 @@ pub trait GitClonable {
     fn checkout(&self, git_ref: &OsStr) -> Result<(), Error> {
         let mut lock = self.lock()?;
 
+        debug!("git checkout {:?}", git_ref);
 
         let result = Command::new("git")
             .arg("checkout")
diff --git a/ofborg/src/tasks/build.rs b/ofborg/src/tasks/build.rs
index 70507b4..ee629fe 100644
--- a/ofborg/src/tasks/build.rs
+++ b/ofborg/src/tasks/build.rs
@@ -62,7 +62,7 @@ impl worker::SimpleWorker for BuildWorker {
             None => { String::from("origin/master") }
         };
 
-        let refpath = co.checkout_ref(target_branch.as_ref()).unwrap();
+        let refpath = co.checkout_origin_ref(target_branch.as_ref()).unwrap();
         co.fetch_pr(job.pr.number).unwrap();
 
         if !co.commit_exists(job.pr.head_sha.as_ref()) {