$ git clone -n https://src.fedoraproject.org/rpms/ghc-hspec-discover.git /var/lib/mock/f40-build-742187-110610/root/chroot_tmpdir/scmroot/ghc-hspec-discover
Cloning into '/var/lib/mock/f40-build-742187-110610/root/chroot_tmpdir/scmroot/ghc-hspec-discover'...
$ git fetch origin ec1c7e99ab5e1e8c9904e8471e34303e85c32af9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hspec-discover
 * [new ref]         ec1c7e99ab5e1e8c9904e8471e34303e85c32af9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec1c7e9 https://hackage.haskell.org/package/hspec-discover-2.10.10/changelog