$ git clone -n https://gitee.com/lslwh/libunwind.git /var/lib/mock/dist-an23-loongarch-build-334406-69656/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an23-loongarch-build-334406-69656/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/lslwh/libunwind
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29a0b35 Add port for Linux on LoongArch