$ git clone -n https://gitee.com/mgb01105731/lua-posix.git /var/lib/mock/dist-an23-build-328885-69136/root/chroot_tmpdir/scmroot/lua-posix
Cloning into '/var/lib/mock/dist-an23-build-328885-69136/root/chroot_tmpdir/scmroot/lua-posix'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/lua-posix
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c255014 update to version 36.2.1