$ git clone -n https://gitee.com/kun-llfl/syslinux.git /var/lib/mock/dist-an23-build-188842-60709/root/chroot_tmpdir/scmroot/syslinux
Cloning into '/var/lib/mock/dist-an23-build-188842-60709/root/chroot_tmpdir/scmroot/syslinux'...
$ git fetch origin 88a1534e19690fccef4506bf97824993941b7143:KOJI_FETCH_HEAD
From https://gitee.com/kun-llfl/syslinux
 * [new ref]         88a1534e19690fccef4506bf97824993941b7143 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88a1534 spec optimisation