$ git clone -n https://src.fedoraproject.org/rpms/iwyu.git /var/lib/mock/f45-build-14286-458/root/chroot_tmpdir/scmroot/iwyu
Cloning into '/var/lib/mock/f45-build-14286-458/root/chroot_tmpdir/scmroot/iwyu'...
$ git fetch origin 663de1c86ae279242c1f8ec1917edda663b62996:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iwyu
 * [new ref]         663de1c86ae279242c1f8ec1917edda663b62996 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 663de1c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild