[MERGE][#144421][#144300] Use write lock in log and status with '-r branch:URL'

[Aaron Bentley]

Aaron Bentley has voted abstain.
Status is now: Semi-approved
Comment:
I find this too hacky to merge.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C1198950827.6593.3.camel%40nemo%3E