Fails to finish building....

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 33.779 s
[INFO] Finished at: 2016-06-04T18:59:21-07:00
[INFO] Final Memory: 33M/821M
[INFO] ------------------------------------------------------------------------
Rebuilding Forked projects....
HEAD is now at d19bb5b SPIGOT-2229: Make PotionType.getDamageValue() attempt sane return.
Resetting Spigot-API to Bukkit...
HEAD is now at d19bb5b SPIGOT-2229: Make PotionType.getDamageValue() attempt sane return.
Applying patches to Spigot-API...
Applying: POM Changes
fatal: sha1 information is lacking or useless (pom.xml).
error: could not build fake ancestor
Patch failed at 0001 POM Changes
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Something did not apply cleanly to Spigot-API.
Please review above details and finish the apply then
save the changes with rebuildPatches.sh
Error compiling Spigot. Please check the wiki for FAQs.
If this does not resolve your issue then please pastebin the entire BuildTools.log.txt file when seeking support.
java.lang.RuntimeException: Error running command, return status !=0: [bash, applyPatches.sh]
at org.spigotmc.builder.Builder.runProcess(Builder.java:547)
at org.spigotmc.builder.Builder.main(Builder.java:429)