added GitFetch to get commit from develop branch

Signed-off-by: Andrea Pinazzi <[email protected]>

library/eclipse-mosquitto

@@ -3,6 +3,7 @@ GitRepo: https://github.com/eclipse/mosquitto.git
 
 Tags: 1.4.12, latest
 GitCommit: 0bb602ed7a89da80d25e6b959a130fdcf0556be5
+GitFetch:  refs/heads/develop
 Directory: docker/1.4.12
 
 Tags: 1.4.10