$ git clone -n https://gitee.com/bbrucezhang/ghc.git /var/lib/mock/dist-oc9-epol-build-185818-80247/root/chroot_tmpdir/scmroot/ghc
Cloning into '/var/lib/mock/dist-oc9-epol-build-185818-80247/root/chroot_tmpdir/scmroot/ghc'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/bbrucezhang/ghc
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb49218 Update to 9.6.6