$ git clone -n https://gitee.com/Weisson/gcc.git /var/lib/mock/dist-an8.10-build-469985-74003/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-an8.10-build-469985-74003/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin d35bd8ff1d96518a68f29fa823ea9f6c8e9a8467:KOJI_FETCH_HEAD
From https://gitee.com/Weisson/gcc
 * [new ref]         d35bd8ff1d96518a68f29fa823ea9f6c8e9a8467 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d35bd8f Exclude offload amdgcn for riscv64 explicitly.