Reconstruct command fails on missing commit in old job

[mattalexander-pantheon]

Orb version

1.2.0

What happened

----------------------------------------------------------------------------------------------------
commit [DELETED] from job 18253 is not an ancestor of the current commit
----------------------------------------------------------------------------------------------------
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 18334  100 18334    0     0  75684      0 --:--:-- --:--:-- --:--:-- 75760
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 18334  100 18334    0     0   110k      0 --:--:-- --:--:-- --:--:--  109k
----------------------------------------------------------------------------------------------------
commit [DELETED] from job 18252 is not an ancestor of the current commit
----------------------------------------------------------------------------------------------------
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13570  100 13570    0     0  84419      0 --:--:-- --:--:-- --:--:-- 84812
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13570  100 13570    0     0  78757      0 --:--:-- --:--:-- --:--:-- 78895
fatal: Not a valid commit name [DELETED]
unknown return code 128 from git merge-base with base commit [DELETED], from job 18251
Exited with code 1
CircleCI received exit code 1

Expected behavior

Since a missing commit may mean that the branch from the old job was deleted, the loop should simply continue.