$ git clone -n https://src.fedoraproject.org/rpms/ghc-MemoTrie.git /var/lib/mock/f41-build-837460-159151/root/chroot_tmpdir/scmroot/ghc-MemoTrie
Cloning into '/var/lib/mock/f41-build-837460-159151/root/chroot_tmpdir/scmroot/ghc-MemoTrie'...
$ git fetch origin 3517ad8113981eda7c654417a9d74960807eb409:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-MemoTrie
 * [new ref]         3517ad8113981eda7c654417a9d74960807eb409 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3517ad8 bump release