$ git clone -n https://src.fedoraproject.org/rpms/dhall.git /var/lib/mock/f38-build-side-42-init-devel-770240-27755/root/chroot_tmpdir/scmroot/dhall
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-770240-27755/root/chroot_tmpdir/scmroot/dhall'...
$ git fetch origin 6d851bc28594a9daaf9502aaa7c9b0ab7d4fcf72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dhall
 * [new ref]         6d851bc28594a9daaf9502aaa7c9b0ab7d4fcf72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d851bc disable i686 since cborg doesn't build with ghc-9.2