I had been following the Developing a simple counter chapter.
All was well.
I created an iceberg repository and added my Project to it.
I committed the sources to git.
Still working OK.
Then I did a push of all that to my GitHub/MichaelKentBurns/MyCounter repository.
I got a progress bar for the push which never made any progress.  
Instead I got the beachball spinner.  After quite some time I wanted to interrupt it to see if I could recover, but I could find a way.
Eventually I had to force-quit.

When I restarted my Pharo image, all of that work was lost because I had not done a save.

My Question: Is there some way to interrupt such a process?

Screen capture attached.