$ git clone -n https://src.fedoraproject.org/rpms/R-lambda.r.git /var/lib/mock/f39-build-1524688-36035/root/chroot_tmpdir/scmroot/R-lambda.r
Cloning into '/var/lib/mock/f39-build-1524688-36035/root/chroot_tmpdir/scmroot/R-lambda.r'...
$ git fetch origin 80437900f10d7d8c0cfefd4b70b6f046821cb691:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-lambda.r
 * [new ref]         80437900f10d7d8c0cfefd4b70b6f046821cb691 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8043790 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild