$ git clone -n https://gitee.com/bbrucezhang/ungoogled-chromium.git /var/lib/mock/dist-oc9-epol-build-236551-82309/root/chroot_tmpdir/scmroot/ungoogled-chromium
Cloning into '/var/lib/mock/dist-oc9-epol-build-236551-82309/root/chroot_tmpdir/scmroot/ungoogled-chromium'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/bbrucezhang/ungoogled-chromium
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 542bc52 为 ungoogled-chromium 增加 aarch64 离线构建支持，并在 Rust 工具链缺少 bindgen 时回退使用系统 bindgen-cli。 修改 flags.linux.gn