[poky] Yocto 2.5 and problem with pseudo-native-1.9.0

[Arno Steffens]

I get an error while building my rootfs, but doesn't have a clue what the error message will tell me:
below:

Same with the log file, I don't get the point. How can I understand this better?

ERROR: pseudo-native-1.9.0+gitAUTOINC+fddbe854c9-r0 do_unpack: Fetcher failure: Fetch command export PSEUDO_DISABLED=1; export DBUS_SESSION_BUS_ADDRESS="unix:abstract=/tmp/dbus-qFLYbSsFJF,guid=c8cffdaaccadb737f94547ed5afa68f2"; export SSH_AGENT_PID="1886"; export SSH_AUTH_SOCK="/run/user/1000/keyring/ssh"; export PATH="/home/user/y/yocto25/poky/scripts/native-intercept:/home/user/y/yocto25/sp/tmp/sysroots-uninative/x86_64-linux/usr/bin:/home/user/y/yocto25/poky/scripts:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/usr/bin/x86_64-linux:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/usr/bin:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/usr/sbin:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/usr/bin:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/sbin:/home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/recipe-sysroot-native/bin:/home/user/y/yocto25/poky/bitbake/bin:/home/user/y/yocto25/sp/tmp/hosttools"; export HOME="/home/user"; git -c core.fsyncobjectfiles=0 checkout -B master fddbe854c9db058d5a05830d3bcdd4233d95ee2e failed with exit code 128, output:
fatal: reference is not a tree: fddbe854c9db058d5a05830d3bcdd4233d95ee2e

ERROR: pseudo-native-1.9.0+gitAUTOINC+fddbe854c9-r0 do_unpack: Function failed: base_do_unpack
ERROR: Logfile of failure stored in: /home/user/y/yocto25/sp/tmp/work/x86_64-linux/pseudo-native/1.9.0+gitAUTOINC+fddbe854c9-r0/temp/log.do_unpack.14717
ERROR: Task (virtual:native:/home/user/y/yocto25/poky/meta/recipes-devtools/pseudo/pseudo_git.bb:do_unpack) failed with exit code '1'
NOTE: Tasks Summary: Attempted 154 tasks of which 151 didn't need to be rerun and 1 failed.