$ git clone -n https://gitee.com/src-anolis-os/gcc-toolset-9-gcc.git /var/lib/mock/dist-an8.7-build-269776-64112/root/chroot_tmpdir/scmroot/gcc-toolset-9-gcc
Cloning into '/var/lib/mock/dist-an8.7-build-269776-64112/root/chroot_tmpdir/scmroot/gcc-toolset-9-gcc'...
$ git reset --hard origin/a8
HEAD is now at bde8bdb update to gcc-toolset-9-gcc-9.2.1-2.3.el8.src.rpm