$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-fix.git /var/lib/mock/f41-build-837921-159471/root/chroot_tmpdir/scmroot/ghc-data-fix
Cloning into '/var/lib/mock/f41-build-837921-159471/root/chroot_tmpdir/scmroot/ghc-data-fix'...
$ git fetch origin 14205758a385bc50ae091c99b8ab56cd228ab193:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-fix
 * [new ref]         14205758a385bc50ae091c99b8ab56cd228ab193 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1420575 https://hackage.haskell.org/package/data-fix-0.3.4/changelog