$ git clone -n https://src.fedoraproject.org/rpms/ghc-hspec-core.git /var/lib/mock/f41-build-839180-160072/root/chroot_tmpdir/scmroot/ghc-hspec-core
Cloning into '/var/lib/mock/f41-build-839180-160072/root/chroot_tmpdir/scmroot/ghc-hspec-core'...
$ git fetch origin f11b4275c5a7df41416800c314b182a72d922fca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hspec-core
 * [new ref]         f11b4275c5a7df41416800c314b182a72d922fca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f11b427 https://hackage.haskell.org/package/hspec-core-2.11.9/changelog