diff --git a/src/Composer/Package/Loader/ArrayLoader.php b/src/Composer/Package/Loader/ArrayLoader.php
index 69d67b5e3..146522ec3 100644
--- a/src/Composer/Package/Loader/ArrayLoader.php
+++ b/src/Composer/Package/Loader/ArrayLoader.php
@@ -65,6 +65,7 @@ class ArrayLoader
             }
             $package->setSourceType($config['source']['type']);
             $package->setSourceUrl($config['source']['url']);
+            $package->setSourceReference($config['source']['reference']);
         }
 
         if (isset($config['dist'])) {
@@ -79,6 +80,7 @@ class ArrayLoader
             }
             $package->setDistType($config['dist']['type']);
             $package->setDistUrl($config['dist']['url']);
+            $package->setDistReference($config['dist']['reference']);
             $package->setDistSha1Checksum($config['dist']['shasum']);
         }
 
diff --git a/src/Composer/Package/MemoryPackage.php b/src/Composer/Package/MemoryPackage.php
index 535b73eb1..eb9f644fd 100644
--- a/src/Composer/Package/MemoryPackage.php
+++ b/src/Composer/Package/MemoryPackage.php
@@ -23,8 +23,10 @@ class MemoryPackage extends BasePackage
     protected $installationSource;
     protected $sourceType;
     protected $sourceUrl;
+    protected $sourceReference;
     protected $distType;
     protected $distUrl;
+    protected $distReference;
     protected $distSha1Checksum;
     protected $releaseType;
     protected $version;
@@ -133,6 +135,22 @@ class MemoryPackage extends BasePackage
         return $this->sourceUrl;
     }
 
+    /**
+     * @param string $reference
+     */
+    public function setSourceReference($reference)
+    {
+        $this->sourceReference = $reference;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getSourceReference()
+    {
+        return $this->sourceReference;
+    }
+
     /**
      * @param string $type
      */
@@ -165,6 +183,22 @@ class MemoryPackage extends BasePackage
         return $this->distUrl;
     }
 
+    /**
+     * @param string $reference
+     */
+    public function setDistReference($reference)
+    {
+        $this->distReference = $reference;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDistReference()
+    {
+        return $this->distReference;
+    }
+
     /**
      * @param string $url
      */
diff --git a/src/Composer/Package/PackageInterface.php b/src/Composer/Package/PackageInterface.php
index ed7c08bf4..54750d907 100644
--- a/src/Composer/Package/PackageInterface.php
+++ b/src/Composer/Package/PackageInterface.php
@@ -110,6 +110,13 @@ interface PackageInterface
      */
     function getSourceUrl();
 
+    /**
+     * Returns the repository reference of this package, e.g. master, 1.0.0 or a commit hash for git
+     *
+     * @return string The repository reference
+     */
+    function getSourceReference();
+
     /**
      * Returns the type of the distribution archive of this version, e.g. zip, tarball
      *
@@ -124,6 +131,13 @@ interface PackageInterface
      */
     function getDistUrl();
 
+    /**
+     * Returns the reference of the distribution archive of this version, e.g. master, 1.0.0 or a commit hash for git
+     *
+     * @return string
+     */
+    function getDistReference();
+
     /**
      * Returns the sha1 checksum for the distribution archive of this version
      *