$ git clone -n https://gitee.com/guost123/gcc.git /var/lib/mock/dist-an23.3-build-431229-73055/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-an23.3-build-431229-73055/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 534b9a26549b6ce10e80034f0ade602bffd38e02:KOJI_FETCH_HEAD
From https://gitee.com/guost123/gcc
 * [new ref]         534b9a26549b6ce10e80034f0ade602bffd38e02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 534b9a2 adapt for riscv64