f003 — reflog

Commit amend changes hash - find original commit before amend

Tests ability to find the original commit before an amend using reflog. Evaluates amend-history tracking via reflog.

Baseline Repository

These commands set up the repo before the model sees the prompt. They define the starting file structure, staged changes, and Git history.

01 git init
02 git config user.email 'test@test.com'
03 git config user.name 'Test User'
04 echo 'function hello() { return 1; }' > app.js
05 git add app.js
06 git commit -m 'Add hello function'
07 echo 'function hello() { return 2; }' > app.js
08 git add app.js
09 git commit -m 'Update hello function v2'
10 git commit --amend -m 'Update hello function - revised'

Prompt

You amended a commit with 'git commit --amend' and need to find the original commit hash before the amendment. The commit message was changed from 'Update hello function v2' to 'Update hello function - revised'. Use git reflog to find the old commit hash.

Expected

Update hello function v2

Campaign Evidence

Loading campaign evidence…

Model Outputs (14)

deepseek/deepseek-v4-flash:high PASS 100% 167 in → 281 out (217 reasoning)

The original commit hash before the amendment is **`67a8e493729979d0c089f96be309d70f1619276d`**. This is the commit at `HEAD@{1}` in the reflog, which has the message "Update hello function v2".

deepseek/deepseek-v4-flash:high__json_schema PASS 100% 172 in → 159 out (111 reasoning)

4afde1106e61e6c26948a8ad6f4ebdec44e2d28a

JSON Schema Structured Output

(raw) {"ref":"4afde1106e61e6c26948a8ad6f4ebdec44e2d28a"}

deepseek/deepseek-v4-flash:none PASS 100% 170 in → 131 out (0 reasoning)

Based on the git reflog you provided, the original commit hash before the amendment is: **`b493f42e5d468dd723d62150a04d8b5853cc7cca`** This can be found at `HEAD@{1}`, which shows the commit with the message "Update hello function v2" - that's your original commit before you amended it to "Update hello function - revised". To verify or restore that commit, you could use: ```bash git show b493f42e5d468dd723d62150a04d8b5853cc7cca ```

deepseek/deepseek-v4-flash:none__json_schema PASS 100% 169 in → 27 out (0 reasoning)

c19d120324f8678729c597f411dd051d7e7a726a

JSON Schema Structured Output

(raw) {"ref":"c19d120324f8678729c597f411dd051d7e7a726a"}

mistralai/devstral-2512 PASS 100% 211 in → 129 out

Based on the `git reflog` output you provided, the original commit hash before the amendment is: `c0a17c02dc3d2c1e9f743fc7fb3cbe6c1e3dd9e1` This is the commit with the message "Update hello function v2" that was later amended to "Update hello function - revised". The amended commit is `884d3bfd984f5d488124233b639c4d57644cd856`.

mistralai/devstral-2512__json_schema PASS 100% 210 in → 44 out

78462e284fbc8863f9d887db3c599796f7475f75

JSON Schema Structured Output

(raw) {"ref": "78462e284fbc8863f9d887db3c599796f7475f75"}

nvidia/nemotron-3-nano-30b-a3b:high PASS 100% 218 in → 280 out (178 reasoning)

The commit you were looking for is recorded one step back in the reflog. ``` HEAD@{1}: commit: Update hello function v2 ``` So the original commit hash is: ``` b8776abddae6724fabf9296ce3f6a0036739fca3 ```

nvidia/nemotron-3-nano-30b-a3b:none PASS 100% 227 in → 253 out (0 reasoning)

The original commit hash before the amendment is found at `HEAD@{1}` in the git reflog. Looking at the provided reflog: - `HEAD@{1}` corresponds to: `f141e858434295930306f1ffcba1a255a726e3bf commit: Update hello function v2` This is the commit that was amended (the one with the original message "Update hello function v2"). The amendment created the new commit with hash `17503f1471f1027f7b28b2f68605eb282c234906` and message "Update hello function - revised". Thus, the original commit hash is **f141e858434295930306f1ffcba1a255a726e3bf**. **Answer:** `f141e858434295930306f1ffcba1a255a726e3bf`

nvidia/nemotron-3-nano-30b-a3b:none__json_schema PASS 100% 225 in → 47 out (0 reasoning)

e9e2e750c249f1ecc1a52460c7b390072c125dc4

JSON Schema Structured Output

(raw) { "ref": "e9e2e750c249f1ecc1a52460c7b390072c125dc4" }

poolside/laguna-xs.2:high PASS 100% 253 in → 408 out (280 reasoning)

Based on the git reflog output you provided, I can see the commit history. The original commit hash before the amendment is: **`241df605fe82a4fac75b178bca720a16d9a1b114`** This is shown at `HEAD@{1}` with the original commit message "Update hello function v2". After the `git commit --amend`, this commit now appears at `HEAD@{1}`, while the amended version is at `HEAD@{0}` with the new message "Update hello function - revised".

poolside/laguna-xs.2:none PASS 100% 264 in → 96 out (0 reasoning)

You can see the original commit in the reflog with the message "Update hello function v2". The hash is **3ab80053a9e789167b5876168d7d82b98d1885f1**. This is shown as `HEAD@{1}` in your reflog output, while the amended commit is at `HEAD@{0}` (the latest position).

nvidia/nemotron-3-nano-30b-a3b:high__json_schema FAIL 0% 230 in → 356 out (279 reasoning)

refs/heads/main

JSON Schema Structured Output

(raw) { "ref": "refs/heads/main" }

Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Update hello function v2'

poolside/laguna-xs.2:high__json_schema FAIL 0% 255 in → 193 out (184 reasoning)

ref

JSON Schema Structured Output

(raw) {"ref": "ref"}

Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Update hello function v2'

poolside/laguna-xs.2:none__json_schema FAIL 0% 257 in → 42 out (0 reasoning)

7e8bf934465def4a35825146f0acca926385c966

JSON Schema Structured Output

(raw) {"ref": "7e8bf934465def4a35825146f0acca926385c966"}

Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Update hello function v2'