$ git clone -n https://gitee.com/opencloudos-stream/clang.git /var/lib/mock/dist-ocs23-riscv-rva23-build-361627-43107/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-ocs23-riscv-rva23-build-361627-43107/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin e4635a5:KOJI_FETCH_HEAD
fatal: couldn't find remote ref e4635a5
$ git reset --hard e4635a5
HEAD is now at e4635a5 riscv64: restrict LTO/debuginfo/dwz opts; add clang-tblgen to devel