$ git clone -n https://gitee.com/src-anolis-os/clang.git /var/lib/mock/dist-an23-loongarch-build-325058-68769/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-loongarch-build-325058-68769/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/clang
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a97740d [LoongArch] Backport patches and add the triple for anolis os