$ git clone -n https://gitee.com/opencloudos-stream/gcc.git /var/lib/mock/dist-ocs23-base-build-299850-29536/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-ocs23-base-build-299850-29536/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/gcc
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c480e3 !15 binutils添加了loongarch新指令补丁后，gcc需要对应重编译 Merge pull request !15 from jeremiazhao/master