$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-docker.git /var/lib/mock/f38-build-side-42-init-devel-719618-27296/root/chroot_tmpdir/scmroot/ghc-language-docker
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-719618-27296/root/chroot_tmpdir/scmroot/ghc-language-docker'...
$ git fetch origin 9c7e8b6b5f93fa01aa252d55391478c28ccf2a0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-docker
 * [new ref]         9c7e8b6b5f93fa01aa252d55391478c28ccf2a0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c7e8b6 Convert to %autorelease and %autochangelog