: GitBench
Rebase conflict resolved incorrectly - find the original branch tip
Tests ability to find original branch tip after incorrect rebase conflict resolution. Evaluates reflog for pre-rebase recovery.

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

  1. 01 git init
  2. 02 git config user.email 'test@test.com'
  3. 03 git config user.name 'Test User'
  4. 04 echo 'config: production' > app.yml
  5. 05 git add app.yml
  6. 06 git commit -m 'Production config'
  7. 07 git checkout -b fix-branch
  8. 08 echo 'config: development' > app.yml
  9. 09 git add app.yml
  10. 10 git commit -m 'Development config'
  11. 11 echo 'config: staging' > app.yml
  12. 12 git add app.yml
  13. 13 git commit -m 'Staging config for testing'
  14. 14 git checkout main
  15. 15 echo 'config: custom' > app.yml
  16. 16 git add app.yml
  17. 17 git commit -m 'Custom config'
  18. 18 git rebase fix-branch
Prompt
You rebased your main branch onto 'fix-branch' but the result is incorrect. You want to go back to the original 'Custom config' commit on main. Use git reflog to find the original main branch HEAD commit hash.
Expected
Custom config
Loading campaign evidence…
deepseek/deepseek-v4-flash:high PASS 100% 305 in → 371 out (295 reasoning)
Based on the git reflog, the original `main` branch HEAD before the rebase was the commit with hash **`9874db1677399224153919d449df45cc9a0d859f`** (labeled "Custom config"). You can reset to it using: ```bash git reset --hard 9874db16 ```
deepseek/deepseek-v4-flash:none PASS 100% 299 in → 161 out (0 reasoning)
Based on the git reflog, the original `main` branch HEAD commit hash (where `Custom config` was committed) is: ``` cf18474e627aa9ce75312af46e9ea154c533d0ba ``` This can be found at `HEAD@{1}` where it shows `commit: Custom config`. This was the state of main before you performed the rebase onto `fix-branch`. To restore your main branch to this commit, you can run: ```bash git checkout main git reset --hard cf18474e627aa9ce75312af46e9ea154c533d0ba ``` This will reset your main branch back to the state before the incorrect rebase, preserving the original `Custom config` commit.
deepseek/deepseek-v4-flash:none__json_schema PASS 100% 302 in → 29 out (0 reasoning)
fb1a9ab052fb665e48da44368b5c67426261a281
JSON Schema Structured Output
(raw) { "ref": "fb1a9ab052fb665e48da44368b5c67426261a281" }
mistralai/devstral-2512 PASS 100% 387 in → 147 out
Based on the `git reflog` output, the original "Custom config" commit on the main branch is at: ``` f094e2deb34b40374dd39d1e7058f5bd439ad6df ``` This is the commit you want to reset your main branch back to. You can do this with: ```bash git reset --hard f094e2deb34b40374dd39d1e7058f5bd439ad6df ``` This will move your main branch back to the "Custom config" commit, discarding the rebase changes.
mistralai/devstral-2512__json_schema PASS 100% 377 in → 42 out
3bea2c8409bb3cecd44ec37b37ffb4d5a31ab693
JSON Schema Structured Output
(raw) { "ref": "3bea2c8409bb3cecd44ec37b37ffb4d5a31ab693" }
nvidia/nemotron-3-nano-30b-a3b:high PASS 100% 401 in → 280 out (57 reasoning)
The commit you’re looking for is: **`70666b4232a7705d96bb6e17c99f3db1dde2c88f`** – the “Custom config” commit that was originally the tip of **main** before the rebase. You can get back to that state with something like: ```bash # Move the current branch (main) back to that commit git reset --hard 70666b4232a7705d96bb6e17c99f3db1dde2c88f ``` After resetting, your `main` branch will point to that exact commit, undoing the incorrect rebase. If you need to push the change (and you’re sure it’s safe), you can force‑push: ```bash git push --force-with-lease origin main ```
nvidia/nemotron-3-nano-30b-a3b:high__json_schema PASS 100% 398 in → 154 out (84 reasoning)
f92ac015611daae857a109bf06bc86f73d40c80e
JSON Schema Structured Output
(raw) { "ref": "f92ac015611daae857a109bf06bc86f73d40c80e" }
poolside/laguna-xs.2:high PASS 100% 415 in → 492 out (311 reasoning)
I can see the git reflog you've provided. Looking for the "Custom config" commit, I can see it's at **HEAD@{1}** with the commit hash: **1886f818e1bf6986b52290af7710e097994a5dd8** This is the commit you want to return to on the main branch. To reset your main branch back to this commit, you would use: ```bash git reset --hard 1886f818e1bf6986b52290af7710e097994a5dd8 ``` This will move your main branch pointer back to the original 'Custom config' commit, effectively undoing the rebase operation.
poolside/laguna-xs.2:high__json_schema PASS 100% 421 in → 509 out (254 reasoning)
763e4908f7e2c576128dc18d6de3c29b11619ba9,1dc95a51cad1e0701b57018f0772916ad700bcf3,0a0756363fdbed7ee0fdc88a45f144079471c95b,763e4908f7e2c576128dc18d6de3c29b11619ba9,9c1de032911fbf8e0feb7b2a363a96251eba2db3,0a0756363fdbed7ee0fdc88a45f144079471c95b,0a0756363fdbed7ee0fdc88a45f144079471c95b
JSON Schema Structured Output
(raw) {"ref":"763e4908f7e2c576128dc18d6de3c29b11619ba9,1dc95a51cad1e0701b57018f0772916ad700bcf3,0a0756363fdbed7ee0fdc88a45f144079471c95b,763e4908f7e2c576128dc18d6de3c29b11619ba9,9c1de032911fbf8e0feb7b2a363a96251eba2db3,0a0756363fdbed7ee0fdc88a45f144079471c95b,0a0756363fdbed7ee0fdc88a45f144079471c95b"}
poolside/laguna-xs.2:none PASS 100% 411 in → 219 out (0 reasoning)
Looking at the git reflog, I can see the history of your main branch operations. The "Custom config" commit that you want to go back to is at: **c2f63ba63608c702e462217cc8ea7defbc4439a5** This corresponds to `HEAD@{1}` in the reflog, which shows: ``` c2f63ba63608c702e462217cc8ea7defbc4439a5 HEAD@{1}: commit: Custom config ``` To reset your main branch back to this commit, you would run: ```bash git reset --hard c2f63ba63608c702e462217cc8ea7defbc4439a5 ``` This will restore your main branch to the state it was in when the "Custom config" commit was the HEAD.
Invalid JSON. Output: The original `main` branch HEAD commit hash before the rebase is `768cf86d0e5e5e32f3e2a50d56160da164d52f11`. This is the "Custom config" commit shown in the reflog at `HEAD@{1}`.
JSON Schema Structured Output
Structured Output Error
Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)
Failure: Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)
nvidia/nemotron-3-nano-30b-a3b:none FAIL 0% 396 in → 26 out (0 reasoning)
Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Custom config'
nvidia/nemotron-3-nano-30b-a3b:none__json_schema FAIL 0% 401 in → 45 out (0 reasoning)
0a0756363fdbed7ee0fdc88a45f144079471c95b
JSON Schema Structured Output
(raw) { "ref": "0a0756363fdbed7ee0fdc88a45f144079471c95b" }
Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Custom config'
poolside/laguna-xs.2:none__json_schema FAIL 0% 419 in → 9 out (0 reasoning)
git/reflog
JSON Schema Structured Output
(raw) {"ref": "git/reflog"}
Failure: Expected output to mention target hash prefix/full hash or matching HEAD@{n} selector for 'Custom config'