[ 89%] Performing build step for 'UKFTractography'
[ 1%] Generating UKF_GIT_HASH
fatal: Not a git repository (or any of the parent directories): .git
make[5]: *** [ukf/CMakeFiles/_GEN_GITVER] Error 128
make[4]: *** [ukf/CMakeFiles/_GEN_GITVER.dir/all] Error 2
make[3]: *** [all] Error 2
make[2]: *** [UKFTractography-prefix/src/UKFTractography-stamp/UKFTractography-build] Error 2
make[1]: *** [CMakeFiles/UKFTractography.dir/all] Error 2
make: *** [all] Error 2
How could I solve it?