Use git rebase -i and replace “pick” on the second and subsequent commits with “squash” or “fixup”, as described in the Git manual.

is the commit after the last one that you wish squash together, i.e. parent of the oldest commit you want to squash.

Example:

You want to squash the last three commits into one, so lets look at the log to make sure that is want you want and to grab the commit SHA:

git log -n 4 –pretty=oneline

f57f7f9c28646d5049aa6b90f33de23e1e53ad2e More test cleanups
07074c8058ed69224670987860c9db47858dab6e PlayScript compiler tests using a variant of compiler-tester
3b80dc06b990553042b4b0cde486e36522f4171b Remove .as/.play from mcs/tests These have been already moved to mcs/play_tests/[as|play] and intregrated into the mono compiler-tester (make [astest|playtest|playscript]
db6506ca17e49f0829ca9859a7994ddf840dbff4 * Tamarin-Redux Test Cleanup * Remove old Tamarin tests, the redux versions are the last released version

I want to squash the first three commits, so grab the forth SHA and:

git rebase -i db6506ca17e49f0829ca9859a7994ddf840dbff4

pick 3b80dc0 Remove .as/.play from mcs/tests These have been already moved to mcs/play_tests/[as|play] and intregrated into the mono compiler-tester (make [astest|playtest|playscript]
pick 07074c8 PlayScript compiler tests using a variant of compiler-tester
pick f57f7f9 More test cleanups

# Rebase db6506c..f57f7f9 onto db6506c (3 command(s))

Following the directions in the commentted text. In this example: change the second and third items to squash:

pick 3b80dc0 Remove .as/.play from mcs/tests These have been already moved to mcs/play_tests/[as|play] and intregrated into the mono compiler-tester (make [astest|playtest|playscript]
squash 07074c8 PlayScript compiler tests using a variant of compiler-tester
squash f57f7f9 More test cleanups

# Rebase db6506c..f57f7f9 onto db6506c (3 command(s))

Save those changes and exit the editor and the rebase will execute

[detached HEAD ~~~
~~~
Successfully rebased and updated refs/heads/play-tests.

Confirm via:

git log -n 2

FYI: This is something you should do to your feature branch before pushing to your fork to make that PlayScript pull request. ;-)