$ git clone -n https://src.fedoraproject.org/rpms/ghc-unordered-containers.git /var/lib/mock/f41-build-838091-159539/root/chroot_tmpdir/scmroot/ghc-unordered-containers
Cloning into '/var/lib/mock/f41-build-838091-159539/root/chroot_tmpdir/scmroot/ghc-unordered-containers'...
$ git fetch origin e4a90857aef6f14a4d114d72adea7c526bad81cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unordered-containers
 * [new ref]         e4a90857aef6f14a4d114d72adea7c526bad81cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4a9085 https://hackage.haskell.org/package/unordered-containers-0.2.20/changelog