$ git clone -n https://gitee.com/mgb01105731/syslinux.git /var/lib/mock/dist-an23-build-135997-50256/root/chroot_tmpdir/scmroot/syslinux
Cloning into '/var/lib/mock/dist-an23-build-135997-50256/root/chroot_tmpdir/scmroot/syslinux'...
$ git reset --hard 637d6b4be222dfa2f806b09214d9ca3b8c4cfe9d
HEAD is now at 637d6b4 optimise spec file & add doc package