$ git clone -n https://src.fedoraproject.org/rpms/ppp.git /var/lib/mock/f45-build-28874-633/root/chroot_tmpdir/scmroot/ppp
Cloning into '/var/lib/mock/f45-build-28874-633/root/chroot_tmpdir/scmroot/ppp'...
$ git fetch origin c8662f462d162a3b546b6f429d0935f3e72073b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ppp
 * [new ref]         c8662f462d162a3b546b6f429d0935f3e72073b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8662f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild