$ git clone -n https://gitee.com/zhaohang_mskdxl/gcc-toolset-12.git /var/lib/mock/dist-an8.8-build-289655-64968/root/chroot_tmpdir/scmroot/gcc-toolset-12
Cloning into '/var/lib/mock/dist-an8.8-build-289655-64968/root/chroot_tmpdir/scmroot/gcc-toolset-12'...
$ git fetch origin b51e2003ff8374ef6e4af21254e3a9c4eb8de75d:KOJI_FETCH_HEAD
From https://gitee.com/zhaohang_mskdxl/gcc-toolset-12
 * [new ref]         b51e2003ff8374ef6e4af21254e3a9c4eb8de75d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b51e200 update to gcc-toolset-12-12.0-6.el8