$ git clone -n https://gitee.com/src-anolis-os/libunwind.git /var/lib/mock/dist-an8-epao-build-419426-72885/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an8-epao-build-419426-72885/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin a8:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/libunwind
 * [new branch]      a8         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27ace51 update to libunwind-1.3.1-3.src.rpm