Do you have the ability to push to the working repository? If so, then you have sign off capability. You'd basically make a new branch in your local repo, and git cherry-pick -s the commits, then push to the working repo. One of the committers could then take that branch and test it before committing to master in the main repository.
Do you have the ability to push to the working repository? If so, then you have sign off capability. You'd basically make a new branch in your local repo, and git cherry-pick -s the commits, then push to the working repo. One of the committers could then take that branch and test it before committing to master in the main repository.