$ git clone -n https://gitee.com/src-anolis-os/gcc-toolset-9-gdb.git /var/lib/mock/dist-an8.7-build-269777-64112/root/chroot_tmpdir/scmroot/gcc-toolset-9-gdb
Cloning into '/var/lib/mock/dist-an8.7-build-269777-64112/root/chroot_tmpdir/scmroot/gcc-toolset-9-gdb'...
$ git reset --hard origin/a8
HEAD is now at 4e542b3 import gcc-toolset-9-gdb-8.3-1.el8.src.rpm