$ git clone -n https://gitee.com/src-anolis-os/mesa.git /var/lib/mock/dist-an8-build-74794-39097/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/dist-an8-build-74794-39097/root/chroot_tmpdir/scmroot/mesa'...
$ git reset --hard origin/a8
HEAD is now at 17a9b09 spec: rebuild with llvm12