$ git clone -n https://src.fedoraproject.org/rpms/ghc-adjunctions.git /var/lib/mock/f41-build-side-1-2805248-32863/root/chroot_tmpdir/scmroot/ghc-adjunctions
Cloning into '/var/lib/mock/f41-build-side-1-2805248-32863/root/chroot_tmpdir/scmroot/ghc-adjunctions'...
$ git fetch origin 7de9d81c0308f26e8876ba10801d70ece3d697f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-adjunctions
 * [new ref]         7de9d81c0308f26e8876ba10801d70ece3d697f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7de9d81 revise .cabal file