Description of problem:
I was checking which groups were installed in my recently upgraded F22 (upgrade done using fedora-update script).

Version-Release number of selected component:
dnf-1.0.0-1.fc22

Additional info:
reporter:       libreport-2.5.1
cmdline:        /usr/bin/python -OO /bin/dnf group mark *Xfce*
dso_list:       python-dnf-1.0.0-1.fc22.noarch
executable:     /bin/dnf
kernel:         3.19.7-200.fc21.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
comps.py:88:install_or_skip:UnicodeEncodeError: 'ascii' codec can't encode character u'\xed' in position 21: ordinal not in range(128)

Traceback (most recent call last):
  File "/bin/dnf", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 185, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 134, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1077, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/commands/group.py", line 379, in run
    return self._mark_install(extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/commands/group.py", line 240, in _mark_install
    dnf.comps.install_or_skip(solver.group_install, res.groups, types)
  File "/usr/lib/python2.7/site-packages/dnf/comps.py", line 88, in install_or_skip
    logger.warning("%s, %s", str(e)[:-1], _("skipping."))
UnicodeEncodeError: 'ascii' codec can't encode character u'\xed' in position 21: ordinal not in range(128)

Local variables in innermost frame:
count: 0
e: CompsError()
grp: <dnf.comps.Group object at 0x7f9e7cd1b150>
install_fnc: <bound method Solver.group_install of <dnf.comps.Solver object at 0x7f9e7ccf4390>>
grp_or_env: [<dnf.comps.Group object at 0x7f9e7cd1b090>, <dnf.comps.Group object at 0x7f9e7cd1b110>, <dnf.comps.Group object at 0x7f9e7cd1b150>, <dnf.comps.Group object at 0x7f9e7cd1b190>, <dnf.comps.Group object at 0x7f9e7cd1b1d0>]
types: 14