Drush hangs out on dl commerce_kickstart in recent days new version of Commerce Kickstart 2 was introduced (v2.55).
I tried upgrading my current installation (v2.54) using drush:

drush --debug dl commerce_kickstart


unfortunately after this line:

Verifying signature for bzr version control engine. [3.27 sec, 42.21 MB]
Executing: bzr root profiles


I'm stuck with this , please give any some tips.
I'm using 7.4.0 drush version.
I'm using drupal 7.60 with Commerce kickstart 2.55 now. I've figured it out. The problem was with the missing command line prompt asking to continue the installation in the current directory.
After debugging drush I noticed that i needed to type "y" than the process started to continue. Anyways it was very strange but finally it worked.