$ git clone -n https://gitee.com/zhaohang_mskdxl/boost.git /var/lib/mock/dist-an23-build-python3.11-372633-71505/root/chroot_tmpdir/scmroot/boost
Cloning into '/var/lib/mock/dist-an23-build-python3.11-372633-71505/root/chroot_tmpdir/scmroot/boost'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/zhaohang_mskdxl/boost
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6db4795 Rebuild for loongarch64