$ git clone -n https://gitee.com/kanghou-silver/libunwind.git /var/lib/mock/dist-an23.3-build-416407-72865/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an23.3-build-416407-72865/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin df958e6b1f747a3dd9a17c11b2bff9781dc5f7fa:KOJI_FETCH_HEAD
From https://gitee.com/kanghou-silver/libunwind
 * [new ref]         df958e6b1f747a3dd9a17c11b2bff9781dc5f7fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df958e6 Add support for SW64