$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-docker.git /var/lib/mock/f39-build-2202238-51859/root/chroot_tmpdir/scmroot/ghc-language-docker
Cloning into '/var/lib/mock/f39-build-2202238-51859/root/chroot_tmpdir/scmroot/ghc-language-docker'...
$ git fetch origin 14382f8c289aa60cec6aa6f77ffc726e66e840f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-docker
 * [new ref]         14382f8c289aa60cec6aa6f77ffc726e66e840f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14382f8 bump release