diff --git a/mercurial/remotenames.py b/mercurial/remotenames.py
new file mode 100644
--- /dev/null
+++ b/mercurial/remotenames.py
@@ -0,0 +1,28 @@
+# remotenames.py
+#
+# Copyright 2017 Facebook, Inc.
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+
+from __future__ import absolute_import
+
+def pullremotenames(localrepo, remoterepo, remotepath):
+    """ pulls bookmarks and branches information of the remote repo during a
+    pull or clone operation.
+    localrepo is our local repository
+    remoterepo is the repo from which we are pulling or cloning
+    remotepath is the path of the remote repository
+    """
+    bookmarks = remoterepo.listkeys('bookmarks')
+    # on a push, we don't want to keep obsolete heads since
+    # they won't show up as heads on the next pull, so we
+    # remove them here otherwise we would require the user
+    # to issue a pull to refresh the storage
+    bmap = {}
+    repo = localrepo.unfiltered()
+    for branch, nodes in remoterepo.branchmap().iteritems():
+        bmap[branch] = []
+        for node in nodes:
+            if node in repo and not repo[node].obsolete():
+                bmap[branch].append(node)