$ git clone -n https://src.fedoraproject.org/rpms/ghc-bencode.git /var/lib/mock/f39-build-1992192-43416/root/chroot_tmpdir/scmroot/ghc-bencode
Cloning into '/var/lib/mock/f39-build-1992192-43416/root/chroot_tmpdir/scmroot/ghc-bencode'...
$ git fetch origin 5f91c848c40e6cb25f511e61a40cf48f830495be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bencode
 * [new ref]         5f91c848c40e6cb25f511e61a40cf48f830495be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f91c84 bump release