If my theory is correct, a workaround may be to set an explicit branch nick in your checkout so it doesn't have to open the master to find it. Although if get_master_branch is failing then I'd still expect the commit to fail a bit further on, but it would then fail with a more relevant error.
If my theory is correct, a workaround may be to set an explicit branch nick in your checkout so it doesn't have to open the master to find it. Although if get_master_branch is failing then I'd still expect the commit to fail a bit further on, but it would then fail with a more relevant error.