$ git clone -n https://gitee.com/kanghou-silver/libunwind.git /var/lib/mock/dist-an23.3-build-415528-72844/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an23.3-build-415528-72844/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin 498e57c724e9058d7e010b5b70a6e8f9e85c2ea3:KOJI_FETCH_HEAD
From https://gitee.com/kanghou-silver/libunwind
 * [new ref]         498e57c724e9058d7e010b5b70a6e8f9e85c2ea3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 498e57c Add support for SW64