$ git clone -n https://src.fedoraproject.org/rpms/ghc-tabular.git /var/lib/mock/f41-build-838082-159539/root/chroot_tmpdir/scmroot/ghc-tabular
Cloning into '/var/lib/mock/f41-build-838082-159539/root/chroot_tmpdir/scmroot/ghc-tabular'...
$ git fetch origin e94052fa34c499b2ddbc7631a338f93639f637b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tabular
 * [new ref]         e94052fa34c499b2ddbc7631a338f93639f637b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e94052f revise .cabal file