Bootstrap with default packageList.txt does not work

During bootstrap I get the following errors with the default packageList.txt. Executing bash mars.sh install afterwards works and will install all those packages that cannot be bootstrapped.
...
cloning mars

Cloning into '.'...
remote: Counting objects: 11610, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 11610 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (11610/11610), 24.86 MiB | 259.00 KiB/s, done.
Resolving deltas: 100% (8405/8405), done.
Checking connectivity... done.
path: simulation
package: mars/common/cfg_manager
folder: mars/common/cfg_manager

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/data_broker
folder: mars/common/data_broker

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/gui/main_gui
folder: mars/common/gui/main_gui

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/gui/lib_manager_gui
folder: mars/common/gui/lib_manager_gui

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/gui/cfg_manager_gui
folder: mars/common/gui/cfg_manager_gui

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/gui/data_broker_gui
folder: mars/common/gui/data_broker_gui

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/gui/log_console
folder: mars/common/gui/log_console

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/interfaces
folder: mars/interfaces

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/gui
folder: mars/gui

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/graphics
folder: mars/graphics

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/sim
folder: mars/sim

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/app
folder: mars/app

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/scene_loader
folder: mars/scene_loader

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/plugins/constraint_plugin
folder: mars/plugins/constraint_plugin

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/graphics/osg_text
folder: mars/common/graphics/osg_text

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars/common/graphics/osg_text_factory
folder: mars/common/graphics/osg_text_factory

fetching mars ...

mars seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: mars_viz
folder: viz

fetching mars_viz ...

mars_viz seems to already exist. updating...

Error: There was an Error. Please check the above output for more information

path: simulation
package: viz_plugin
folder: viz_plugin

fetching viz_plugin ...

viz_plugin seems to already exist. updating...

Error: There was an Error. Please check the above output for more information
rock-simulation / mars_install_scripts

Bootstrap with default packageList.txt does not work #7
