$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rspec-rails.git /var/lib/mock/f40-build-2149687-50890/root/chroot_tmpdir/scmroot/rubygem-rspec-rails
Cloning into '/var/lib/mock/f40-build-2149687-50890/root/chroot_tmpdir/scmroot/rubygem-rspec-rails'...
$ git fetch origin 5f46d8fe388b16ef3abef7217accca2dc2fbe7af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rspec-rails
 * [new ref]         5f46d8fe388b16ef3abef7217accca2dc2fbe7af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f46d8f Update to rspec-rails 6.0.3.