$ git clone -n https://src.fedoraproject.org/rpms/ghc-unix-time.git /var/lib/mock/f40-build-1998409-44235/root/chroot_tmpdir/scmroot/ghc-unix-time
Cloning into '/var/lib/mock/f40-build-1998409-44235/root/chroot_tmpdir/scmroot/ghc-unix-time'...
$ git fetch origin 47058318b0bfd5c657c8a77372c57ec47b3f4bb2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unix-time
 * [new ref]         47058318b0bfd5c657c8a77372c57ec47b3f4bb2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4705831 https://hackage.haskell.org/package/unix-time-0.4.10/changelog