~/lorries/open-source-lorries # cat libpopt.lorry
{
  "libpopt": {
    "type": "cvs",
    "url": ":pserver:anonymous@rpm5.org:/cvs",
    "module": "popt"
  }
}

~/lorries/open-source-lorries # lorry --verbose --pull-only libpopt.lorry
Processing spec file libpopt.lorry
Getting: libpopt
Getting libpopt
.. backing up libpopt git repository to /root/lorries/open-source-lorries/workd/libpopt/git-pre-update



.. backing up libpopt git repository to /root/lorries/open-source-lorries/workd/libpopt/git-post-fail
.. restoring libpopt good git repository
Mirror of libpopt failed, state before mirror is saved at /root/lorries/open-source-lorries/workd/libpopt/git-pre-update and state after mirror is saved at /root/lorries/open-source-lorries/workd/libpopt/git-post-fail
Error mirroring:
Traceback (most recent call last):
  File "/usr/bin/lorry", line 110, in process_args
    self.gitify(name, specs[name])
  File "/usr/bin/lorry", line 222, in gitify
    table[vcstype](name, dirname, gitdir, spec)
  File "/usr/bin/lorry", line 448, in gitify_cvs
    env=env)
  File "/usr/bin/lorry", line 516, in run_program
    (' '.join(argv), exit, self.indent(err or '')))
Exception: git cvsimport -a -d :pserver:anonymous@rpm5.org:/cvs -C /root/lorries/open-source-lorries/workd/libpopt/git popt failed (exit code 128):
    perl: warning: Setting locale failed.
    perl: warning: Please check that your locale settings:
    	LANGUAGE = (unset),
    	LC_ALL = (unset),
    	LANG = "en_GB.UTF-8"
        are supported and installed on your system.
    perl: warning: Falling back to the standard locale ("C").
    fatal: Needed a single revision
    fatal: Needed a single revision
    fatal: Can merge only exactly one commit into empty head
    Could not merge origin into the current branch.

Done