$ git clone -n https://src.fedoraproject.org/rpms/rubygem-curb.git /var/lib/mock/f31-build-51659-27519/root/thebuilddir/tmp/scmroot/rubygem-curb
Cloning into '/var/lib/mock/f31-build-51659-27519/root/thebuilddir/tmp/scmroot/rubygem-curb'...
$ git reset --hard 2d05e8fd6802cd604410679c6dc8e9050bfbeaed
HEAD is now at 2d05e8f Update to curb 0.9.9.