$ git clone -n https://src.fedoraproject.org/rpms/cdk.git /var/lib/mock/f45-build-4282-331/root/chroot_tmpdir/scmroot/cdk
Cloning into '/var/lib/mock/f45-build-4282-331/root/chroot_tmpdir/scmroot/cdk'...
$ git fetch origin 6eeac122988392d0f38dfaa8b94540aa473a5c52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cdk
 * [new ref]         6eeac122988392d0f38dfaa8b94540aa473a5c52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6eeac12 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild