$ git clone -n https://gitee.com/guost123/m4.git /var/lib/mock/dist-an23-build-441838-73171/root/chroot_tmpdir/scmroot/m4
Cloning into '/var/lib/mock/dist-an23-build-441838-73171/root/chroot_tmpdir/scmroot/m4'...
$ git fetch origin 782f82bc9ee8742bebc58ce0a38aa8cb36abeb05:KOJI_FETCH_HEAD
From https://gitee.com/guost123/m4
 * [new ref]         782f82bc9ee8742bebc58ce0a38aa8cb36abeb05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 782f82b add support for riscv64