$ git clone -n https://gitee.com/yangxiaojuan-loongson/mesa.git /var/lib/mock/dist-an23-build-307892-67129/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/dist-an23-build-307892-67129/root/chroot_tmpdir/scmroot/mesa'...
$ git fetch origin efc8c3a556a3e3908ecb46c5ab8cc3c0227100f1:KOJI_FETCH_HEAD
From https://gitee.com/yangxiaojuan-loongson/mesa
 * [new ref]         efc8c3a556a3e3908ecb46c5ab8cc3c0227100f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at efc8c3a Add loongarch64 support