$ git clone -n https://src.fedoraproject.org/rpms/wf-config.git /var/lib/mock/f45-build-38332-723/root/chroot_tmpdir/scmroot/wf-config
Cloning into '/var/lib/mock/f45-build-38332-723/root/chroot_tmpdir/scmroot/wf-config'...
$ git fetch origin 871057ef97c4c6da668099995fb1e3a5959e659a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wf-config
 * [new ref]         871057ef97c4c6da668099995fb1e3a5959e659a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 871057e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild