[buildbot] phase1: do not perform shallow fetches

[LEDE Commits]

jow pushed a commit to buildbot.git, branch master:
https://git.lede-project.org/da4174f4bd4d3af7e10f3d9f3fcd5ac713b33b09

commit da4174f4bd4d3af7e10f3d9f3fcd5ac713b33b09
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Thu Mar 16 19:34:11 2017 +0100

    phase1: do not perform shallow fetches
    
    We do need the full history later on.
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 phase1/master.cfg | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/phase1/master.cfg b/phase1/master.cfg
index 991039f..04879e8 100644
--- a/phase1/master.cfg
+++ b/phase1/master.cfg
@@ -400,7 +400,7 @@ for target in targets:
 	factory.addStep(ShellCommand(
 		name = "switchbranch",
 		description = "Checking out Git branch",
-		command = "if [ -d .git ]; then git fetch --depth=1 && git checkout '%s'; else exit 0; fi" % repo_branch,
+		command = "if [ -d .git ]; then git fetch && git checkout '%s'; else exit 0; fi" % repo_branch,
 		haltOnFailure = True,
 		doStepIf = IsNoTaggingRequested
 	))