Rud5G

# create alias for cli gerrit requests
alias gerrit='ssh -p 29418 gerrit.yourdomain.com gerrit'

# get tempfile for the ids
tmpfileids=$(tempfile -d /tmp)

# get all commit number ids for the project YOUR_PROJECT_NAME
gerrit query 'status:open project:YOUR_PROJECT_NAME' | egrep '^\ +number' | cut -d' ' -f4- > $tmpfileids

# do mass abandon