Where the hooks can be configured?
The Jira Hooks for Bitbucket can be configured on project and repository level
Project: https://your.bitbucket.server.de/projects/<project_slug>/settings
Repository: https://your.bitbucket.server.de/projects/<project_slug>/repos/<repository_slug>/settings
Push Checks
To enable (or disable) hooks (requires project/repository admin permissions):
Go to Project or Repository settings > Hooks.
Enable or Disable the needed Hooks
Merge Checks
To enable (or disable) hooks (requires project/repository admin permissions):
Go to Project or Repository settings > Merge checks.
Enable or Disable the needed Hooks