$ git clone -n https://gitee.com/kun-llfl/syslinux /var/lib/mock/dist-an23-build-188632-60702/root/chroot_tmpdir/scmroot/syslinux
Cloning into '/var/lib/mock/dist-an23-build-188632-60702/root/chroot_tmpdir/scmroot/syslinux'...
$ git fetch origin 3c4db4ce487e20822554f983374a3d2a1b1c7e8f:KOJI_FETCH_HEAD
From https://gitee.com/kun-llfl/syslinux
 * [new ref]         3c4db4ce487e20822554f983374a3d2a1b1c7e8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c4db4c  optimise spec file & add doc package