server/resources/message_templates/build_started.ftl (5 lines of code) (raw):
<#-- Uses FreeMarker template syntax, template guide can be found at http://freemarker.org/docs/dgui.html -->
<#import "common.ftl" as common>
<#global message>Build started<#if build.triggeredBy.triggeredByUser> (triggered by ${build.triggeredBy.user.descriptiveName})</#if>.
${project.fullName}::${buildType.name} <@common.short_build_info build/>, agent ${agentName}
${link.buildResultsLink}</#global>