$ git clone -n https://gitee.com/opencloudos-stream/cross-toolchains.git /var/lib/mock/dist-oc9-epol-build-236127-82230/root/chroot_tmpdir/scmroot/cross-toolchains
Cloning into '/var/lib/mock/dist-oc9-epol-build-236127-82230/root/chroot_tmpdir/scmroot/cross-toolchains'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/cross-toolchains
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c727c4 !2 ExcludeArch loongarch64 Merge pull request !2 from Xinlong-Chen/master