Version-Release number of selected component:
dnf-1.1.7-2.fc23

Additional info:
reporter:       libreport-2.6.4
cmdline:        /usr/bin/python3 /bin/dnf --enablerepo=updates-testing groupinstall 'Pracovn\xc3\xad plochy KDE Plasma'
executable:     /bin/dnf
kernel:         4.4.4-301.fc23.x86_64
runlevel:       N 5
type:           Python3
uid:            0

Truncated backtrace:
pycomp.py:67:write_to_file:UnicodeEncodeError: 'ascii' codec can't encode character '\xed' in position 49: ordinal not in range(128)

Traceback (most recent call last):
  File "/bin/dnf", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 174, in user_main
    errcode = main(args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 60, in main
    return _main(base, args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 120, in _main
    ret = resolving(cli, base)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 149, in resolving
    base.do_transaction(display=displays)
  File "/usr/lib/python3.4/site-packages/dnf/cli/cli.py", line 228, in do_transaction
    super(BaseCli, self).do_transaction(display)
  File "/usr/lib/python3.4/site-packages/dnf/base.py", line 615, in do_transaction
    self._run_transaction(cb=cb)
  File "/usr/lib/python3.4/site-packages/dnf/base.py", line 737, in _run_transaction
    self.verify_transaction(cb.verify_tsi_package)
  File "/usr/lib/python3.4/site-packages/dnf/base.py", line 797, in verify_transaction
    yumdb_info.command_line = ' '.join(self.args)
  File "/usr/lib/python3.4/site-packages/dnf/yum/rpmsack.py", line 298, in __setattr__
    self._write(attr, value)
  File "/usr/lib/python3.4/site-packages/dnf/yum/rpmsack.py", line 234, in _write
    dnf.pycomp.write_to_file(fo, value)
  File "/usr/lib/python3.4/site-packages/dnf/pycomp.py", line 67, in write_to_file
    f.write(content)
UnicodeEncodeError: 'ascii' codec can't encode character '\xed' in position 49: ordinal not in range(128)

Local variables in innermost frame:
content: '--enablerepo=updates-testing groupinstall Pracovní plochy KDE Plasma'
f: <_io.TextIOWrapper name='/var/lib/dnf/yumdb/k/2b6b433d1bbac3055953d28afe4768c72653be46-kcm-gtk-0.5.3-18.fc23-x86_64/command_line.tmp' mode='w' encoding='ANSI_X3.4-1968'>