$ git clone -n https://src.fedoraproject.org/rpms/dhall.git /var/lib/mock/f40-build-768611-125356/root/chroot_tmpdir/scmroot/dhall
Cloning into '/var/lib/mock/f40-build-768611-125356/root/chroot_tmpdir/scmroot/dhall'...
$ git fetch origin edfe611279d071a1afd21a8d8737364229c29f01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dhall
 * [new ref]         edfe611279d071a1afd21a8d8737364229c29f01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edfe611 revised .cabal file