$ git clone -n https://src.fedoraproject.org/rpms/growlight.git /var/lib/mock/f42-build-888884-188755/root/chroot_tmpdir/scmroot/growlight
Cloning into '/var/lib/mock/f42-build-888884-188755/root/chroot_tmpdir/scmroot/growlight'...
$ git fetch origin 24e03acab17a09384ee29c534c93a9ad660e5f64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/growlight
 * [new ref]         24e03acab17a09384ee29c534c93a9ad660e5f64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24e03ac move binaries among buildroot