$ git clone -n https://src.fedoraproject.org/rpms/fxdiv.git /var/lib/mock/f45-build-9356-403/root/chroot_tmpdir/scmroot/fxdiv
Cloning into '/var/lib/mock/f45-build-9356-403/root/chroot_tmpdir/scmroot/fxdiv'...
$ git fetch origin 09071be873264fac73d0568324b927d68bfa8587:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fxdiv
 * [new ref]         09071be873264fac73d0568324b927d68bfa8587 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09071be Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild