Source control errors prevent publishing app - help!

[gpopp]

Our dev instance got a clone from our test instance and this seems to have somehow broken source control.
When trying to publish, we get an error dialog:
"An error occurred while executing that operation. Try again, check logs, and contact support if the error persists"

System logs show this error:
Error occurred while exporting application : com.glide.sourcecontrol.SourceControlException: org.eclipse.jgit.api.errors.RefNotFoundException: Ref HEAD can not be resolved: com.glide.sourcecontrol.AGitRepository.createBranch(AGitRepository.java:551)
com.glide.sourcecontrol.AGitRepository.createBranch(AGitRepository.java:530)
com.glide.sourcecontrol.AGitRepository.checkout(AGitRepository.java:583)
com.glide.sourcecontrol.AGitRepository.checkout(AGitRepository.java:559)
com.glide.sourcecontrol.worker.git.GitWorkerHelper.initRepo(GitWorkerHelper.java:104)
com.glide.sourcecontrol.worker.git.GitExportApplicationWorker.exportApp(GitExportApplicationWorker.java:151)
com.glide.sourcecontrol.worker.ExportApplicationWorker.execute(ExportApplicationWorker.java:96)
com.glide.sourcecontrol.SourceControlWorker.startWork(SourceControlWorker.java:41)
com.glide.worker.AbstractProgressWorker.startAndWait(AbstractProgressWorker.java:126)
com.glide.worker.HierarchicalProgressWorker.startAndWait(HierarchicalProgressWorker.java:35)
com.glide.worker.BackgroundProgressJob.execute(BackgroundProgressJob.java:59)
com.glide.schedule.JobExecutor.lambda$executeJob$0(JobExecutor.java:113)
com.glide.schedule.JobExecutor.executeJob(JobExecutor.java:116)
com.glide.schedule.JobExecutor.execute(JobExecutor.java:100)
com.glide.schedule_v2.SchedulerWorkerThread.executeJob(SchedulerWorkerThread.java:300)
com.glide.schedule_v2.SchedulerWorkerThread.lambda$process$0(SchedulerWorkerThread.java:188)
com.glide.worker.TransactionalWorkerThread.executeInTransaction(TransactionalWorkerThread.java:35)
com.glide.schedule_v2.SchedulerWorkerThread.process(SchedulerWorkerThread.java:188)
com.glide.schedule_v2.SchedulerWorkerThread.run(SchedulerWorkerThread.java:102)

We have ensured our credentials are valid and that the repo is undamaged and reachable from our instance.

We would like to completely remove the source control linkage from this app so that we can publish, but there seems to be no way to do this from within studio. Does anyone know how to clear out the repository configuration for an app? What table holds this data?
Thanks!

[Maik Skoddow]

Great that you found a solution! Maybe you could mark my answer as correct answer? Thank you!

[gpopp]

For anyone wishing to Disconnect an app from source control (which you can't do inside of Studio):

Navigate to:

https://<YourInstanceName>.service-now.com/nav_to.do?uri=%2Fsys_repo_config_list.do
Find the application record you want to remove from source control, click on the select box and choose "delete" from the "Actions on selected rows...." drop-down.
You'll get a dire warning of all the things that will be deleted, but you can go ahead from there and do it.

[limedzeze]

This has been the solution for a few different problems we have run into, so thank you for posting this.

[Tim Woodruff]

Changing the repo your application is associated with is possible, but not very intuitive, @gpopp mentioned; almost actively obfuscated. I just wrote an article on how to do do it, here.