$ git clone -n https://src.fedoraproject.org/rpms/qrupdate.git /var/lib/mock/f45-build-34005-676/root/chroot_tmpdir/scmroot/qrupdate
Cloning into '/var/lib/mock/f45-build-34005-676/root/chroot_tmpdir/scmroot/qrupdate'...
$ git fetch origin 5c0f2b56e91a308019844ef3538232f121efafc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qrupdate
 * [new ref]         5c0f2b56e91a308019844ef3538232f121efafc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c0f2b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild