I am using SourceTree 3.0.17 with my free bitbucket cloud account.
`Tools > Options > Authentication > {Edit Account}`
I see `Authentication: OK`
`git -c diff.mnemonicprefix=false -c core.quotepath=false fetch origin
error: cannot open .git/FETCH_HEAD: Permission denied
error: cannot open .git/FETCH_HEAD: Permission denied
error: cannot open .git/FETCH_HEAD: Permission denied
error: cannot open .git/FETCH_HEAD: Permission denied
Completed with errors, see above.`
