$ git clone -n https://gitee.com/alpha-wang/libunwind.git /var/lib/mock/dist-an8.9-build-427816-72901/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an8.9-build-427816-72901/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin 35abb8811ffeafda0826cef030c2214f63b18730:KOJI_FETCH_HEAD
From https://gitee.com/alpha-wang/libunwind
 * [new ref]         35abb8811ffeafda0826cef030c2214f63b18730 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35abb88 update to 1.4.0