$ git clone -n https://src.fedoraproject.org/rpms/ghc-tf-random.git /var/lib/mock/f38-build-side-42-init-devel-757410-27679/root/chroot_tmpdir/scmroot/ghc-tf-random
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-757410-27679/root/chroot_tmpdir/scmroot/ghc-tf-random'...
$ git fetch origin 5a78f0cb56fcd0951e12e08fd6df4cbebe4207a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tf-random
 * [new ref]         5a78f0cb56fcd0951e12e08fd6df4cbebe4207a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a78f0c Convert to %autorelease and %autochangelog