$ git clone -n https://src.fedoraproject.org/rpms/perl-CPAN-Perl-Releases.git /var/lib/mock/f45-build-22074-589/root/chroot_tmpdir/scmroot/perl-CPAN-Perl-Releases
Cloning into '/var/lib/mock/f45-build-22074-589/root/chroot_tmpdir/scmroot/perl-CPAN-Perl-Releases'...
$ git fetch origin ea9b78c741e33f6f02dedec5b7a1dcaccdb13021:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CPAN-Perl-Releases
 * [new ref]         ea9b78c741e33f6f02dedec5b7a1dcaccdb13021 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea9b78c 5.20260820 bump (rhbz#2520882)