$ git clone -n https://src.fedoraproject.org/rpms/lasso.git /var/lib/mock/f40-build-2210780-52187/root/chroot_tmpdir/scmroot/lasso
Cloning into '/var/lib/mock/f40-build-2210780-52187/root/chroot_tmpdir/scmroot/lasso'...
$ git fetch origin a8e038a11b13dc9899023e9c6ed027843bca8503:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lasso
 * [new ref]         a8e038a11b13dc9899023e9c6ed027843bca8503 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8e038a Fix for https://fedoraproject.org/wiki/Changes/PortingToModernC