$ git clone -n https://src.fedoraproject.org/rpms/perl-CPAN.git /var/lib/mock/f41-build-816912-150476/root/chroot_tmpdir/scmroot/perl-CPAN
Cloning into '/var/lib/mock/f41-build-816912-150476/root/chroot_tmpdir/scmroot/perl-CPAN'...
$ git fetch origin 91b574442c93a4d324f4a21f32867674b086d8f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CPAN
 * [new ref]         91b574442c93a4d324f4a21f32867674b086d8f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91b5744 Perl 5.40 re-rebuild of bootstrapped packages