You can convert git commits into patch files. Those can be used to apply to a different repository  or by someone else (e.g. sent when sent to them via e-mail).
git format-patch COMMIT_REFERENCEto convert all commits since the referenced commit (not including it) into patch files.
For example, let's say you prepared 2 commits. Run:
git format-patch HEAD~~
This will create 2 files, one for each commit since
HEAD~~, like these:
When the commit lives in Gitlab, you may append ".patch" to the commit URL to get a patch-formatted response. Save the page (Ctrl + S) to a patch file and continue below.
You can use
git apply some.patch to have the changes from the
.patch file applied to your current working directory. They will be unstaged and need to be committed by you.
To apply a patch as a commit (with its commit message), use
git am some.patch. \
For all patches to be applied, simply run:
git am *.patch
Note that in some previous version you could pass the latest patch filename of a list of patches to apply all previous patches as well:
git am 0002-allow-users-to-be-locked.patch # May no longer work for you
You then have the 2 unpushed commits from the patch file created earlier.
 Note that you can add other git repositories/directories as a remote source. Sometimes you don't want (or can't do) that but can still use patches.