$ git clone -n https://src.fedoraproject.org/rpms/perl-CPAN-Mini.git /var/lib/mock/f45-build-22018-589/root/chroot_tmpdir/scmroot/perl-CPAN-Mini
Cloning into '/var/lib/mock/f45-build-22018-589/root/chroot_tmpdir/scmroot/perl-CPAN-Mini'...
$ git fetch origin e19a43662307c90d6d2bab605b1e2d5c3dbb8bb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CPAN-Mini
 * [new ref]         e19a43662307c90d6d2bab605b1e2d5c3dbb8bb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e19a436 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild