diff --git a/git_refs.py b/git_refs.py
index 1124143..18c9230 100644
--- a/git_refs.py
+++ b/git_refs.py
@@ -115,10 +115,10 @@
 
         line = line[:-1]
         p = line.split(' ')
-        id = p[0]
+        ref_id = p[0]
         name = p[1]
 
-        self._phyref[name] = id
+        self._phyref[name] = ref_id
     finally:
       fd.close()
     self._mtime['packed-refs'] = mtime
@@ -144,18 +144,18 @@
     try:
       try:
         mtime = os.path.getmtime(path)
-        id = fd.readline()
+        ref_id = fd.readline()
       except:
         return
     finally:
       fd.close()
 
-    if not id:
+    if not ref_id:
       return
-    id = id[:-1]
+    ref_id = ref_id[:-1]
 
-    if id.startswith('ref: '):
-      self._symref[name] = id[5:]
+    if ref_id.startswith('ref: '):
+      self._symref[name] = ref_id[5:]
     else:
-      self._phyref[name] = id
+      self._phyref[name] = ref_id
     self._mtime[name] = mtime