Bug 1328803

Description of problem:
rebase-helper fails to download sources when URL contains # character, which is typically the case when copy&pasting links from PyPi.

Version-Release number of selected component (if applicable):
rebase-helper-0.7.3-1.fc23.noarch

How reproducible:
100 %

Steps to Reproduce:
1. fedpkg clone python-ldap
2. cd python-ldap
3. rebase-helper 'https://pypi.python.org/packages/9b/1a/f2bc7ebf2f0b21d78d7cc2b5c283fb265397912cd63c4b53c83223ebcac9/python-ldap-2.4.25.tar.gz#md5=21523bf21dbe566e0259030f66f7a487'

Actual results:
$ rebase-helper 'https://pypi.python.org/packages/9b/1a/f2bc7ebf2f0b21d78d7cc2b5c283fb265397912cd63c4b53c83223ebcac9/python-ldap-2.4.25.tar.gz#md5=21523bf21dbe566e0259030f66f7a487'
Results directory 'rebase-helper-results' exists, removing it
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
warning: bogus date in %changelog: Tue May 15 2006 Matthew Barnes <mbarnes> - 2.2.0-1
Workspace directory 'rebase-helper-workspace' exists, removing it
Traceback (most recent call last):
  File "/bin/rebase-helper", line 9, in <module>
    load_entry_point('rebasehelper==0.7.3', 'console_scripts', 'rebase-helper')()
  File "/usr/lib/python2.7/site-packages/rebasehelper/cli.py", line 148, in run
    app.run()
  File "/usr/lib/python2.7/site-packages/rebasehelper/application.py", line 655, in run
    sources = self.prepare_sources()
  File "/usr/lib/python2.7/site-packages/rebasehelper/application.py", line 358, in prepare_sources
    os.path.join(self.execution_dir, settings.NEW_SOURCES_DIR))
  File "/usr/lib/python2.7/site-packages/rebasehelper/application.py", line 322, in extract_sources
    Application.extract_archive(archive_path, destination)
  File "/usr/lib/python2.7/site-packages/rebasehelper/application.py", line 313, in extract_archive
    archive.extract_archive(destination)
  File "/usr/lib/python2.7/site-packages/rebasehelper/archive.py", line 275, in extract_archive
    archive = self._archive_type.open(self._filename)
  File "/usr/lib/python2.7/site-packages/rebasehelper/archive.py", line 151, in open
    return tarfile.TarFile.open(filename)
  File "/usr/lib64/python2.7/tarfile.py", line 1678, in open
    raise ReadError("file could not be opened successfully")
tarfile.ReadError: file could not be opened successfully


Expected results:
It should not blow up :-)

Additional info:
It downloaded two files:
	python-ldap-..tar.gz
	python-ldap-.python.tar.gz