reposync command fails when downloadcomps parameter is used on RHEL8

Issue

• reposync command fails when "--downloadcomps" parameter is used

# reposync --repo rhel-8-for-x86_64-baseos-htb-rpms -p /var/www/html/test --download-metadata --downloadcomps
Updating Subscription Management repositories.
    Updating Subscription Management repositories.
Red Hat Enterprise Linux 8 for x86_64 - BaseOS HTB (RPMs)                       1.7 kB/s | 4.1 kB     00:02    
Red Hat Enterprise Linux 8 for x86_64 - BaseOS HTB (RPMs)                       6.1 MB/s |  55 MB     00:08    
Traceback (most recent call last):
  File "/usr/bin/reposync", line 98, in <module>
    main.user_main(MAPPING[command] + args, exit_code=True)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 179, in user_main
    errcode = main(args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 64, in main
    return _main(base, args, cli_class, option_parser_class)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 99, in _main
    return cli_run(cli, base)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 115, in cli_run
    cli.run()
  File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 1055, in run
    return self.command.run()
  File "/usr/lib/python3.6/site-packages/dnf-plugins/reposync.py", line 105, in run
    self.getcomps(repo)
  File "/usr/lib/python3.6/site-packages/dnf-plugins/reposync.py", line 144, in getcomps
    comps_fn = repo.metadata._comps_fn
AttributeError: 'Metadata' object has no attribute '_comps_fn'