$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Load.git /var/lib/mock/f45-build-22418-591/root/chroot_tmpdir/scmroot/perl-Class-Load
Cloning into '/var/lib/mock/f45-build-22418-591/root/chroot_tmpdir/scmroot/perl-Class-Load'...
$ git fetch origin a04de2d8fa82428026dbf95c062ab67b61bae488:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Load
 * [new ref]         a04de2d8fa82428026dbf95c062ab67b61bae488 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a04de2d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild