Git - Cherry pick a single commit for pull request

I might not have the terminology down yet. I made file to be added to a open project on git. I forked the project. I made some changes and my last commit is the file I want to request to the project and not the small changes I made before hand. When I go to github site and make pull request I get all the commits before the one I want which is last one of a file and I don't' want to submit all of the other commits because I don't think its necessary for the project. Just my own changes. What do I do? Should I just make another res or attach the file singularly and submit, if that's possible.

You need to create a fresh branch from the remote HEAD, cherry-pick the commit to that branch, push the branch to your repo on GitHub, then create a pull request.

git checkout -b mybranch
git fetch upstream
git reset --hard upstream/master
git cherry-pick <commit-hash>
git push origin mybranch:mybranch

As I'm doing this a lot, and had to look up this answer a few times, I put SLaks answer into a little batch file. This is for Windows / CMD but should be trivial to port to Linux, Mac or PowerShell. As I usually do several commits, each being one pull request, I also added switching back to the master branch.

@echo off

REM Idea from: https://stackoverflow.com/questions/25955822/git-cherry-pick-a-single-commit-for-pull-request

set BRANCH_NAME=%1
set COMMIT_HASH=%2

IF %BRANCH_NAME%.==. GOTO NoBranchName
IF %COMMIT_HASH%.==. GOTO NoCommitId

git checkout -b %BRANCH_NAME%
git fetch upstream
git reset --hard upstream/master
git cherry-pick %COMMIT_HASH%
git push origin %BRANCH_NAME%:%BRANCH_NAME%
git switch master

GOTO End

:NoBranchName
  ECHO No branch name given. Usage: add-pull-request.bat BRANCH_NAME COMMIT_HASH
GOTO End

:NoCommitId
  ECHO No commit id given. Usage: add-pull-request.bat BRANCH_NAME COMMIT_HASH
GOTO End

:End

One obvious improvement would be first picking up the current branch and then use that in the last line but that's something I didn't need and it would make the whole thing significantly more complex.