$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-CPAN-Meta.git /var/lib/mock/f45-build-26558-618/root/chroot_tmpdir/scmroot/perl-Test-CPAN-Meta
Cloning into '/var/lib/mock/f45-build-26558-618/root/chroot_tmpdir/scmroot/perl-Test-CPAN-Meta'...
$ git fetch origin 99b4bebe2e9844b52d94025e2e1e2775e0d5cf8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-CPAN-Meta
 * [new ref]         99b4bebe2e9844b52d94025e2e1e2775e0d5cf8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99b4beb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild