$ git clone -n https://gitee.com/yangxiaojuan-loongson/mesa.git /var/lib/mock/dist-an23-build-306679-67065/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/dist-an23-build-306679-67065/root/chroot_tmpdir/scmroot/mesa'...
$ git fetch origin c3d7ecc0b42ddfc2ba03a743e23ced11bac3d888:KOJI_FETCH_HEAD
From https://gitee.com/yangxiaojuan-loongson/mesa
 * [new ref]         c3d7ecc0b42ddfc2ba03a743e23ced11bac3d888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3d7ecc Add loongarch64 support