$ git clone -n https://gitee.com/yan1hcdc/qemu.git /var/lib/mock/dist-an23-build-442113-73171/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/dist-an23-build-442113-73171/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin 426f9b93d523fd8fe02738788b19ccf5b9329c13:KOJI_FETCH_HEAD
From https://gitee.com/yan1hcdc/qemu
 * [new ref]         426f9b93d523fd8fe02738788b19ccf5b9329c13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 426f9b9 add support for riscv build