And use the new getlogin()

Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>

roles/git/hooks/files/post-receive-fedmsg

@@ -87,6 +87,7 @@ def getlogin():
     except:
         return os.environ['USER']
 
+
 # Read in all the rev information git-receive-pack hands us.
 lines = [line.split() for line in sys.stdin.readlines()]
 for line in lines:
@@ -131,7 +132,7 @@ for line in lines:
             repo=repo_name,
             namespace=namespace,
             branch=branch,
-            agent=os.getlogin(),
+            agent=getlogin(),
         )
 
     commits = map(_build_commit, revs)