$ git clone -n https://src.fedoraproject.org/rpms/rakudo.git /var/lib/mock/f40-build-2136303-50815/root/chroot_tmpdir/scmroot/rakudo
Cloning into '/var/lib/mock/f40-build-2136303-50815/root/chroot_tmpdir/scmroot/rakudo'...
$ git fetch origin 06099cb43411cef60d2d1442cbdc41964e33c075:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rakudo
 * [new ref]         06099cb43411cef60d2d1442cbdc41964e33c075 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06099cb [packit] 2023.12 upstream release