$ git clone -n https://src.fedoraproject.org/rpms/ghc-simple-prompt.git /var/lib/mock/f41-build-838911-159871/root/chroot_tmpdir/scmroot/ghc-simple-prompt
Cloning into '/var/lib/mock/f41-build-838911-159871/root/chroot_tmpdir/scmroot/ghc-simple-prompt'...
$ git fetch origin d58f0d8b3389c982038a6f4207e484d94853b0d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-simple-prompt
 * [new ref]         d58f0d8b3389c982038a6f4207e484d94853b0d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d58f0d8 https://hackage.haskell.org/package/simple-prompt-0.2.3/changelog