$ git clone -n https://gitee.com/guost123/m4.git /var/lib/mock/dist-an23-build-441804-73171/root/chroot_tmpdir/scmroot/m4
Cloning into '/var/lib/mock/dist-an23-build-441804-73171/root/chroot_tmpdir/scmroot/m4'...
$ git fetch origin 187c7e120bbf0490083d02295ecc4bd88c0968ff:KOJI_FETCH_HEAD
From https://gitee.com/guost123/m4
 * [new ref]         187c7e120bbf0490083d02295ecc4bd88c0968ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 187c7e1 add support for riscv64