$ git clone -n https://gitee.com/src-anolis-os/m4.git /var/lib/mock/dist-an23.3-riscv-build-437683-73130/root/chroot_tmpdir/scmroot/m4
Cloning into '/var/lib/mock/dist-an23.3-riscv-build-437683-73130/root/chroot_tmpdir/scmroot/m4'...
$ git fetch origin b4548429608d7822c02cdb935877b4ecd4ae6de5:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/m4
 * [new ref]         b4548429608d7822c02cdb935877b4ecd4ae6de5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b454842 optimise spec file