$ git clone -n https://src.fedoraproject.org/rpms/ghc-deepseq-generics.git /var/lib/mock/f41-build-837487-159153/root/chroot_tmpdir/scmroot/ghc-deepseq-generics
Cloning into '/var/lib/mock/f41-build-837487-159153/root/chroot_tmpdir/scmroot/ghc-deepseq-generics'...
$ git fetch origin 983ca69dd283227594bf95e6774cb6a519e8b040:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-deepseq-generics
 * [new ref]         983ca69dd283227594bf95e6774cb6a519e8b040 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 983ca69 refresh .cabal revision