$ git clone -n https://src.fedoraproject.org/rpms/ghc-fast-logger.git /var/lib/mock/f40-build-743581-111265/root/chroot_tmpdir/scmroot/ghc-fast-logger
Cloning into '/var/lib/mock/f40-build-743581-111265/root/chroot_tmpdir/scmroot/ghc-fast-logger'...
$ git fetch origin dfba28d1cc96b6f6931f63b8ae837a42c7612d21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fast-logger
 * [new ref]         dfba28d1cc96b6f6931f63b8ae837a42c7612d21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfba28d disable tests: since easy-file needs tasty now