diff -r 0ebd94ac56d1 -r e7bb5fc4570c hgext/lfs/blobstore.py
--- a/hgext/lfs/blobstore.py	Thu Dec 14 15:03:55 2017 -0800
+++ b/hgext/lfs/blobstore.py	Thu Dec 14 13:04:08 2017 -0500
@@ -125,7 +125,8 @@
         self.ui = ui
         baseurl, authinfo = url.authinfo()
         self.baseurl = baseurl.rstrip('/')
-        self.urlopener = urlmod.opener(ui, authinfo)
+        useragent = 'mercurial/%s git/2.15.1' % util.version()
+        self.urlopener = urlmod.opener(ui, authinfo, useragent)
         self.retry = ui.configint('lfs', 'retry')
 
     def writebatch(self, pointers, fromstore):