Bug 1249274

Description of problem:
Can run build

Version-Release number of selected component (if applicable):
fedmsg-0.13.1-4.fc21.noarch

How reproducible:
Randomly

$ fedpkg -v build
Creating repo object from /work/fedora/horde/php-horde-wicked
Initiating a koji session to http://koji.fedoraproject.org/kojihub
Could not execute build: (-1, 'Unexpected EOF')
Traceback (most recent call last):
  File "/usr/bin/fedpkg", line 16, in <module>
    main()
  File "/usr/lib/python2.7/site-packages/fedpkg/__main__.py", line 68, in main
    sys.exit(client.args.command())
  File "/usr/lib/python2.7/site-packages/pyrpkg/cli.py", line 884, in build
    sets, nvr_check)
  File "/usr/lib/python2.7/site-packages/pyrpkg/__init__.py", line 1786, in build
    build = self.kojisession.getBuild(self.nvr)
  File "/usr/lib/python2.7/site-packages/koji/__init__.py", line 1577, in __call__
    return self.__func(self.__name,args,opts)
  File "/usr/lib/python2.7/site-packages/koji/__init__.py", line 1920, in _callMethod
    return self._sendCall(handler, headers, request)
  File "/usr/lib/python2.7/site-packages/koji/__init__.py", line 1831, in _sendCall
    return self._sendOneCall(handler, headers, request)
  File "/usr/lib/python2.7/site-packages/koji/__init__.py", line 1851, in _sendOneCall
    response = cnx.getresponse()
  File "/usr/lib64/python2.7/httplib.py", line 1067, in getresponse
    response.begin()
  File "/usr/lib64/python2.7/httplib.py", line 409, in begin
    version, status, reason = self._read_status()
  File "/usr/lib64/python2.7/httplib.py", line 365, in _read_status
    line = self.fp.readline(_MAXLINE + 1)
  File "/usr/lib64/python2.7/socket.py", line 476, in readline
    data = self._sock.recv(self._rbufsize)
  File "/usr/lib/python2.7/site-packages/koji/ssl/SSLConnection.py", line 140, in recv
    return con.recv(bufsize, flags)
OpenSSL.SSL.SysCallError: (-1, 'Unexpected EOF')

It seems we encounter some timeout during koji connection.
It seems Fedora 22 is not affected (but I have only build a few package there, the one I can't build from my F21 box)