$ git clone -n https://gitee.com/mgb01105731/gcc-toolset-15-gcc.git /var/lib/mock/dist-an23-build-536522-82662/root/chroot_tmpdir/scmroot/gcc-toolset-15-gcc
Cloning into '/var/lib/mock/dist-an23-build-536522-82662/root/chroot_tmpdir/scmroot/gcc-toolset-15-gcc'...
$ git fetch origin e4008dd99c669d3d7e1591972aeb8b39e618f3d6:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc-toolset-15-gcc
 * [new ref]         e4008dd99c669d3d7e1591972aeb8b39e618f3d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4008dd Init