$ git clone -n https://src.fedoraproject.org/rpms/perl-CPAN-Meta-YAML.git /var/lib/mock/f41-build-816887-150476/root/chroot_tmpdir/scmroot/perl-CPAN-Meta-YAML
Cloning into '/var/lib/mock/f41-build-816887-150476/root/chroot_tmpdir/scmroot/perl-CPAN-Meta-YAML'...
$ git fetch origin 18eea0ae21e998172b6ea18f8635bd61166bb7e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CPAN-Meta-YAML
 * [new ref]         18eea0ae21e998172b6ea18f8635bd61166bb7e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18eea0a Perl 5.40 re-rebuild of bootstrapped packages