$ git clone -n https://src.fedoraproject.org/rpms/dl-fedora.git /var/lib/mock/f40-build-746061-112349/root/chroot_tmpdir/scmroot/dl-fedora
Cloning into '/var/lib/mock/f40-build-746061-112349/root/chroot_tmpdir/scmroot/dl-fedora'...
$ git fetch origin 81e88fec59c6cca0142c79450ec5a5935e65c820:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dl-fedora
 * [new ref]         81e88fec59c6cca0142c79450ec5a5935e65c820 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81e88fe https://hackage.haskell.org/package/dl-fedora-1.0/changelog