$ git clone -n https://gitee.com/bbrucezhang/ungoogled-chromium.git /var/lib/mock/dist-oc9-epol-build-236646-82310/root/chroot_tmpdir/scmroot/ungoogled-chromium
Cloning into '/var/lib/mock/dist-oc9-epol-build-236646-82310/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 0de564a Update .gitignore to exclude rust-toolchain-linux-aarch64.tar.xz, enhance generate-rust-toolchain-aarch64.sh for unified vendor dependencies, and update SHA512 checksum for rust-toolchain-linux-aarch64.tar.xz.