$ git clone -n https://src.fedoraproject.org/rpms/libnxz.git /var/lib/mock/f38-build-718571-96741/root/chroot_tmpdir/scmroot/libnxz
Cloning into '/var/lib/mock/f38-build-718571-96741/root/chroot_tmpdir/scmroot/libnxz'...
$ git fetch origin 9c06028d87c1d70df36b3c19b5d4b8d26028f017:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnxz
 * [new ref]         9c06028d87c1d70df36b3c19b5d4b8d26028f017 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c06028 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild