$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-xattr.git /var/lib/mock/f29-build-3748-949/root/thebuilddir/tmp/scmroot/php-pecl-xattr
Cloning into '/var/lib/mock/f29-build-3748-949/root/thebuilddir/tmp/scmroot/php-pecl-xattr'...
$ git reset --hard 4f0f70fa842371c01399851dfa7cfb7f3ce8b519
HEAD is now at 4f0f70f - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild