$ git clone -n https://gitee.com/Zlh-giteezone/libunwind.git /var/lib/mock/dist-an23-build-479666-74220/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an23-build-479666-74220/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin fac1f107ed83d6eca47cec35468485c53d932f4d:KOJI_FETCH_HEAD
From https://gitee.com/Zlh-giteezone/libunwind
 * [new ref]         fac1f107ed83d6eca47cec35468485c53d932f4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fac1f10 Add support for SW64.