$ git clone -n https://src.fedoraproject.org/rpms/dhall-json.git /var/lib/mock/f41-build-840845-160994/root/chroot_tmpdir/scmroot/dhall-json
Cloning into '/var/lib/mock/f41-build-840845-160994/root/chroot_tmpdir/scmroot/dhall-json'...
$ git fetch origin 1e43eea2a8cb2f0987ebd8baeffc71e8c4085eab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dhall-json
 * [new ref]         1e43eea2a8cb2f0987ebd8baeffc71e8c4085eab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e43eea https://hackage.haskell.org/package/dhall-json-1.7.12/changelog