$ git clone -n https://src.fedoraproject.org/rpms/perl-Perl-Critic.git /var/lib/mock/f45-build-25718-612/root/chroot_tmpdir/scmroot/perl-Perl-Critic
Cloning into '/var/lib/mock/f45-build-25718-612/root/chroot_tmpdir/scmroot/perl-Perl-Critic'...
$ git fetch origin 84a966f4370f7a786c8c50f221af8a1d35279c34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Perl-Critic
 * [new ref]         84a966f4370f7a786c8c50f221af8a1d35279c34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84a966f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild